中国水稻科学 ›› 2022, Vol. 36 ›› Issue (1): 55-64.DOI: 10.16819/j.1001-7216.2022.201108
蒋艳方#, 陈基旺#, 崔璨, 王晓玉, 陈平平, 周文新*(
), 易镇邪*()
收稿日期:2020-11-20
修回日期:2021-05-20
出版日期:2022-01-10
发布日期:2022-01-10
通讯作者:
周文新,易镇邪
作者简介:第一联系人：#共同第一作者;
JIANG Yanfang#, CHEN Jiwang#, CUI Can, WANG Xiaoyu, CHEN Pingping, ZHOU Wenxin*(), YI Zhenxie*()
Received:2020-11-20
Revised:2021-05-20
Online:2022-01-10
Published:2022-01-10
Contact:
ZHOU Wenxin, YI Zhenxie
About author:First author contact:#These authors contributed equally to this work;
摘要：
【目的】探究杂交稻头季与再生季镉积累分配特性差异,为再生稻安全生产提供科学依据。【方法】以Y两优9918和甬优4149为材料,采用随机区组设计开展大田试验,比较头季与再生季产量与镉积累分配特性。【结果】1）甬优4149再生季产量显著低于头季,而Y两优9918表现相反;两品种再生季有效穗数、结实率显著高于头季,而千粒重显著低于头季;2）两品种头季成熟期根、茎、叶、穗镉含量均显著低于再生季,再生季糙米镉含量为0.13~0.17 mg/kg,显著高于头季;3）再生季各器官镉含量、镉积累量、日均镉积累速率、镉转移系数与富集系数均大于头季,Y两优9918与甬优4149再生季镉总积累量分别是头季的4.28和2.67倍,再生季糙米镉含量分别是头季的1.63和1.42倍;4）头季穗部镉主要来自灌浆中期-成熟期,而再生季主要来自齐穗前,镉积累最快阶段存在品种间差异;5）两品种稻桩镉积累量在再生季全生育期内表现累积趋势,但各生育阶段的表现存在品种间差异,Y两优9918以灌浆中期为界先降后升,甬优4149表现先降后升再降趋势。6）本研究条件下,Y两优9918头季产量低于甬优4149,但再生季产量表现相反,两品种全年产量差异不大;甬优4149器官镉含量、积累量、日均积累速率及富集系数一般高于Y两优9918。【结论】再生季镉超标风险大于头季,在镉污染稻作区应慎重发展再生稻,同时再生季降镉措施的应用应以齐穗前为重点。
蒋艳方, 陈基旺, 崔璨, 王晓玉, 陈平平, 周文新, 易镇邪. 杂交稻头季与再生季镉积累分配特性差异研究[J]. 中国水稻科学, 2022, 36(1): 55-64.
JIANG Yanfang, CHEN Jiwang, CUI Can, WANG Xiaoyu, CHEN Pingping, ZHOU Wenxin, YI Zhenxie. Difference in Cd Accumulation and Distribution Between Main and Ratooning Crops of Hybrid Rice[J]. Chinese Journal OF Rice Science, 2022, 36(1): 55-64.
| 器官 Organ | 季别 Season | Y两优9918 Y Liangyou 9918 | 甬优4149 Yongyou 4149 | ||||
|---|---|---|---|---|---|---|---|
| 齐穗期 Full heading | 灌浆中期 Mid-filling | 成熟期 Maturity | 齐穗期 Full heading | 灌浆中期 Mid-filling | 成熟期 Maturity | ||
| 茎Stem | 头季 MC | 5.71 a | 6.31 a | 4.74 b | 4.14 a | 4.05 b | 5.03 a |
| 再生季RC | 5.69 a | 4.50 b | 5.31 a | 4.16 a | 4.79 a | 3.71 b | |
| 叶Leaf | 头季 MC | 3.31 a | 3.66 a | 2.50 a | 2.60 a | 2.54 a | 2.85 a |
| 再生季RC | 2.21 b | 2.50 b | 1.70 b | 2.16 b | 1.99 b | 1.64 b | |
| 穗Panicle | 头季 MC | 1.51 b | 5.89 b | 8.50 b | 1.55 b | 5.03 b | 7.71 a |
| 再生季RC | 3.80 a | 7.22 a | 9.05 a | 2.02 a | 6.05 a | 7.00 b | |
| 稻桩Stubble | 再生季RR | 2.02 | 1.94 | 1.64 | 3.04 | 2.12 | 2.16 |
表1 头季与再生季的地上部干物质量
Table 1 Dry matter weight of aboveground parts of main crop and ratooning crop. t/hm2
| 器官 Organ | 季别 Season | Y两优9918 Y Liangyou 9918 | 甬优4149 Yongyou 4149 | ||||
|---|---|---|---|---|---|---|---|
| 齐穗期 Full heading | 灌浆中期 Mid-filling | 成熟期 Maturity | 齐穗期 Full heading | 灌浆中期 Mid-filling | 成熟期 Maturity | ||
| 茎Stem | 头季 MC | 5.71 a | 6.31 a | 4.74 b | 4.14 a | 4.05 b | 5.03 a |
| 再生季RC | 5.69 a | 4.50 b | 5.31 a | 4.16 a | 4.79 a | 3.71 b | |
| 叶Leaf | 头季 MC | 3.31 a | 3.66 a | 2.50 a | 2.60 a | 2.54 a | 2.85 a |
| 再生季RC | 2.21 b | 2.50 b | 1.70 b | 2.16 b | 1.99 b | 1.64 b | |
| 穗Panicle | 头季 MC | 1.51 b | 5.89 b | 8.50 b | 1.55 b | 5.03 b | 7.71 a |
| 再生季RC | 3.80 a | 7.22 a | 9.05 a | 2.02 a | 6.05 a | 7.00 b | |
| 稻桩Stubble | 再生季RR | 2.02 | 1.94 | 1.64 | 3.04 | 2.12 | 2.16 |
| 品种 Variety | 季别 Season | 有效穗数 Effective panicle number/(×106·hm-2) | 每穗实粒数 Filled grain number per panicle | 结实率 Seed setting rate/% | 千粒重 1000-grain weigt/g | 理论产量Theoretical yield /(t·hm-2) | 实际产量 Actual yield /(t·hm-2) |
|---|---|---|---|---|---|---|---|
| Y两优9918 Y Liangyou 9918 | 头季 MC | 2.69±0.27 b | 78.73±3.01 b | 62.07±3.90 b | 27.97±0.35 a | 5.94±0.08 b | 5.80±0.17 b |
| 再生季RC | 3.74±0.37 a | 82.75±4.93 a | 74.73±5.27 a | 24.51±0.12 b | 7.58±0.43 a | 7.30±0.22 a | |
| 甬优4149 Yongyou 4149 | 头季 MC | 2.55±0.26 b | 130.23±3.49 a | 62.64±8.56 b | 24.53±0.06 a | 8.13±0.22 a | 8.05±0.24 a |
| 再生季RC | 2.87±0.29 a | 83.41±4.52 b | 68.97±4.38 a | 23.23±1.22 b | 5.56±0.24 b | 5.24±0.16 b |
表2 头季与再生季的产量及其构成
Table 2 Yield and its components of main crop and ratooning crop.
| 品种 Variety | 季别 Season | 有效穗数 Effective panicle number/(×106·hm-2) | 每穗实粒数 Filled grain number per panicle | 结实率 Seed setting rate/% | 千粒重 1000-grain weigt/g | 理论产量Theoretical yield /(t·hm-2) | 实际产量 Actual yield /(t·hm-2) |
|---|---|---|---|---|---|---|---|
| Y两优9918 Y Liangyou 9918 | 头季 MC | 2.69±0.27 b | 78.73±3.01 b | 62.07±3.90 b | 27.97±0.35 a | 5.94±0.08 b | 5.80±0.17 b |
| 再生季RC | 3.74±0.37 a | 82.75±4.93 a | 74.73±5.27 a | 24.51±0.12 b | 7.58±0.43 a | 7.30±0.22 a | |
| 甬优4149 Yongyou 4149 | 头季 MC | 2.55±0.26 b | 130.23±3.49 a | 62.64±8.56 b | 24.53±0.06 a | 8.13±0.22 a | 8.05±0.24 a |
| 再生季RC | 2.87±0.29 a | 83.41±4.52 b | 68.97±4.38 a | 23.23±1.22 b | 5.56±0.24 b | 5.24±0.16 b |
| 器官 Organ | 季别 Season | Y两优9918 Y Liangyou 9918 | 甬优4149 Yongyou 4149 | ||||
|---|---|---|---|---|---|---|---|
| 齐穗期 Full heading | 灌浆中期 Mid-filling | 成熟期 Maturity | 齐穗期 Full heading | 灌浆中期 Mid-filling | 成熟期 Maturity | ||
| 根Root | 头季 MC | 1.10±0.04 b | 1.34±0.00 b | 1.18±0.04 b | 2.74±0.41 b | 1.93±0.05 b | 2.08±0.25 b |
| 再生季RC | 5.54±0.11 a | 3.32±0.10 a | 2.49±0.05 a | 3.64±0.21 a | 4.42±0.02 a | 2.75±0.27 a | |
| 茎Stem | 头季 MC | 0.12±0.00 b | 0.17±0.00 b | 0.22±0.00 b | 0.32±0.01 b | 0.31±0.00 b | 0.37±0.00 b |
| 再生季RC | 0.93±0.01 a | 0.91±0.02 a | 1.37±0.03 a | 1.20±0.01 a | 1.30±0.01 a | 1.50±0.01 a | |
| 叶Leaf | 头季 MC | 0.07±0.00 a | 0.08±0.01 b | 0.09±0.01 b | 0.12±0.01 a | 0.15±0.01 a | 0.16±0.00 b |
| 再生季RC | 0.07±0.01 a | 0.12±0.00 a | 0.31±0.01 a | 0.10±0.01 b | 0.13±0.01 b | 0.28±0.01 a | |
| 穗Panicle | 头季 MC | 0.06±0.00 b | 0.06±0.00 b | 0.12±0.01 b | 0.11±0.01 b | 0.10±0.01 b | 0.14±0.01 b |
| 再生季RC | 0.30±0.00 a | 0.22±0.01 a | 0.19±0.00 a | 0.53±0.01 a | 0.25±0.01 a | 0.23±0.01 a | |
表3 头季与再生季各器官的镉含量
Table 3 Cd content in organs of main crop and ratooning rice. mg/kg
| 器官 Organ | 季别 Season | Y两优9918 Y Liangyou 9918 | 甬优4149 Yongyou 4149 | ||||
|---|---|---|---|---|---|---|---|
| 齐穗期 Full heading | 灌浆中期 Mid-filling | 成熟期 Maturity | 齐穗期 Full heading | 灌浆中期 Mid-filling | 成熟期 Maturity | ||
| 根Root | 头季 MC | 1.10±0.04 b | 1.34±0.00 b | 1.18±0.04 b | 2.74±0.41 b | 1.93±0.05 b | 2.08±0.25 b |
| 再生季RC | 5.54±0.11 a | 3.32±0.10 a | 2.49±0.05 a | 3.64±0.21 a | 4.42±0.02 a | 2.75±0.27 a | |
| 茎Stem | 头季 MC | 0.12±0.00 b | 0.17±0.00 b | 0.22±0.00 b | 0.32±0.01 b | 0.31±0.00 b | 0.37±0.00 b |
| 再生季RC | 0.93±0.01 a | 0.91±0.02 a | 1.37±0.03 a | 1.20±0.01 a | 1.30±0.01 a | 1.50±0.01 a | |
| 叶Leaf | 头季 MC | 0.07±0.00 a | 0.08±0.01 b | 0.09±0.01 b | 0.12±0.01 a | 0.15±0.01 a | 0.16±0.00 b |
| 再生季RC | 0.07±0.01 a | 0.12±0.00 a | 0.31±0.01 a | 0.10±0.01 b | 0.13±0.01 b | 0.28±0.01 a | |
| 穗Panicle | 头季 MC | 0.06±0.00 b | 0.06±0.00 b | 0.12±0.01 b | 0.11±0.01 b | 0.10±0.01 b | 0.14±0.01 b |
| 再生季RC | 0.30±0.00 a | 0.22±0.01 a | 0.19±0.00 a | 0.53±0.01 a | 0.25±0.01 a | 0.23±0.01 a | |
| 品种 Variety | 季别 Growing season | 枝梗 Branch | 空粒 Empty grain | 颖壳 Glume | 糙米 Brown rice |
|---|---|---|---|---|---|
| Y两优9918 Y Liangyou 9918 | 头季 MC | 0.11±0.02 b | 0.07±0.00 b | 0.14±0.01 b | 0.08±0.00 b |
| 再生季RC | 0.54±0.00 a | 0.30±0.01 a | 0.20±0.00 a | 0.13±0.00 a | |
| 甬优4149 Yongyou 4149 | 头季 MC | 0.15±0.01 b | 0.16±0.01 b | 0.14±0.01 b | 0.12±0.01 b |
| 再生季RC | 0.71±0.00 a | 0.36±0.02 a | 0.19±0.00 a | 0.17±0.00 a |
表4 头季与再生季成熟期穗各部位的镉含量
Table 4 Cd content in different parts of panicles at maturity of main crop and ratooning rice. mg/kg
| 品种 Variety | 季别 Growing season | 枝梗 Branch | 空粒 Empty grain | 颖壳 Glume | 糙米 Brown rice |
|---|---|---|---|---|---|
| Y两优9918 Y Liangyou 9918 | 头季 MC | 0.11±0.02 b | 0.07±0.00 b | 0.14±0.01 b | 0.08±0.00 b |
| 再生季RC | 0.54±0.00 a | 0.30±0.01 a | 0.20±0.00 a | 0.13±0.00 a | |
| 甬优4149 Yongyou 4149 | 头季 MC | 0.15±0.01 b | 0.16±0.01 b | 0.14±0.01 b | 0.12±0.01 b |
| 再生季RC | 0.71±0.00 a | 0.36±0.02 a | 0.19±0.00 a | 0.17±0.00 a |
| 品种 Variety | 生育阶段 Growth period | 季别 Season | 全株 Whole plant | 茎 Stem | 叶 Leaf | 穗 Panicle | 稻桩 Stubble |
|---|---|---|---|---|---|---|---|
| Y两优9918 Y Liangyou 9918 | 齐穗前 Pre-heading | 头季 MC | 1037.96±15.20 b | 709.32±9.62 b | 234.23±4.28 a | 94.40±1.24 b | |
| 再生季RC | 5425.68±56.71 a | 4381.75±36.50 a | 162.70±17.74 b | 1157.85±10.22 a | -276.63±0.82 | ||
| 齐穗–灌浆中期 Heading–Mid-filling | 头季 MC | 631.93±149.25 b | 339.87±49.77 b | 48.17±4.31 b | 243.88±24.97 b | ||
| 再生季RC | 1075.01±68.19 a | 647.53±42.49 a | 127.34±26.19 a | 402.84±80.90 a | -102.70±6.63 | ||
| 灌浆中期–成熟 Mid-filling–Maturity | 头季 MC | 646.50±164.94 b | 5.97±1.58 b | -67.82±91.52 b | 708.35±86.91 a | ||
| 再生季RC | 3415.19±226.61 a | 2225.35±114.55 a | 228.82±21.75 a | 125.42±18.53 b | 835.59±17.18 | ||
| 全生育期 | 头季 MC | 2316.39±118.20 b | 1055.16±11.66 b | 214.58±17.21 b | 1046.63±97.58 b | ||
| Whole duration | 再生季RC | 9915.88±216.22 a | 7254.63±181.31 a | 518.87±26.53 a | 1686.11±27.03 a | 456.26±6.91 | |
| 甬优4149 Yongyou 4149 | 齐穗前 Pre-heading | 头季 MC | 1808.53±89.32 b | 1313.86±33.52 b | 317.05±32.96 a | 177.62±22.84 b | |
| 再生季RC | 7237.58±108.73 a | 5085.10±57.06 a | 207.27±11.11 b | 1060.93±18.74 a | 884.28±16.98 | ||
| 齐穗–灌浆中期 Heading–Mid-filling | 头季 MC | 305.37±42.01 b | -69.74±3.10 b | 60.78±8.32 a | 314.33±13.37 b | ||
| 再生季RC | 1021.21±112.99 a | 1151.44±13.03 a | 44.65±2.74 b | 341.73±23.11 a | -516.61±74.10 | ||
| 灌浆中期–成熟 Mid-filling–Maturity | 头季 MC | 1269.38±314.80 a | 618.89±29.81 a | 68.22±7.66 b | 582.27±98.07 a | ||
| 再生季RC | 786.63±152.69 b | -659.64±11.85 b | 203.47±26.07 a | 184.29±11.20 b | 1058.50±4.56 | ||
| 全生育期 | 头季 MC | 3383.28±92.80 b | 1863.01±19.39 b | 446.05±11.56 a | 1074.22±61.85 b | ||
| Whole duration | 再生季RC | 9045.42±143.28 a | 5576.9±32.93 a | 455.39±12.23 a | 1586.95±76.96 a | 1426.17±21.80 |
表5 头季与再生季各生育阶段的镉积累量
Table 5 Cd accumulation at different growth periods of main crop and ratooning crop. mg/hm2
| 品种 Variety | 生育阶段 Growth period | 季别 Season | 全株 Whole plant | 茎 Stem | 叶 Leaf | 穗 Panicle | 稻桩 Stubble |
|---|---|---|---|---|---|---|---|
| Y两优9918 Y Liangyou 9918 | 齐穗前 Pre-heading | 头季 MC | 1037.96±15.20 b | 709.32±9.62 b | 234.23±4.28 a | 94.40±1.24 b | |
| 再生季RC | 5425.68±56.71 a | 4381.75±36.50 a | 162.70±17.74 b | 1157.85±10.22 a | -276.63±0.82 | ||
| 齐穗–灌浆中期 Heading–Mid-filling | 头季 MC | 631.93±149.25 b | 339.87±49.77 b | 48.17±4.31 b | 243.88±24.97 b | ||
| 再生季RC | 1075.01±68.19 a | 647.53±42.49 a | 127.34±26.19 a | 402.84±80.90 a | -102.70±6.63 | ||
| 灌浆中期–成熟 Mid-filling–Maturity | 头季 MC | 646.50±164.94 b | 5.97±1.58 b | -67.82±91.52 b | 708.35±86.91 a | ||
| 再生季RC | 3415.19±226.61 a | 2225.35±114.55 a | 228.82±21.75 a | 125.42±18.53 b | 835.59±17.18 | ||
| 全生育期 | 头季 MC | 2316.39±118.20 b | 1055.16±11.66 b | 214.58±17.21 b | 1046.63±97.58 b | ||
| Whole duration | 再生季RC | 9915.88±216.22 a | 7254.63±181.31 a | 518.87±26.53 a | 1686.11±27.03 a | 456.26±6.91 | |
| 甬优4149 Yongyou 4149 | 齐穗前 Pre-heading | 头季 MC | 1808.53±89.32 b | 1313.86±33.52 b | 317.05±32.96 a | 177.62±22.84 b | |
| 再生季RC | 7237.58±108.73 a | 5085.10±57.06 a | 207.27±11.11 b | 1060.93±18.74 a | 884.28±16.98 | ||
| 齐穗–灌浆中期 Heading–Mid-filling | 头季 MC | 305.37±42.01 b | -69.74±3.10 b | 60.78±8.32 a | 314.33±13.37 b | ||
| 再生季RC | 1021.21±112.99 a | 1151.44±13.03 a | 44.65±2.74 b | 341.73±23.11 a | -516.61±74.10 | ||
| 灌浆中期–成熟 Mid-filling–Maturity | 头季 MC | 1269.38±314.80 a | 618.89±29.81 a | 68.22±7.66 b | 582.27±98.07 a | ||
| 再生季RC | 786.63±152.69 b | -659.64±11.85 b | 203.47±26.07 a | 184.29±11.20 b | 1058.50±4.56 | ||
| 全生育期 | 头季 MC | 3383.28±92.80 b | 1863.01±19.39 b | 446.05±11.56 a | 1074.22±61.85 b | ||
| Whole duration | 再生季RC | 9045.42±143.28 a | 5576.9±32.93 a | 455.39±12.23 a | 1586.95±76.96 a | 1426.17±21.80 |
| 品种 Variety | 生育阶段 Growth period | 季别 Season | 全株 Whole plant | 茎 Stem | 叶 Leaf | 穗 Panicle | 稻桩 Stubble |
|---|---|---|---|---|---|---|---|
| Y两优9918 Y Liangyou 9918 | 齐穗前 Pre-heading | 头季 MC | 12.66±0.16 b | 8.65±0.12 b | 2.86±0.05 b | 1.15±0.02 b | |
| 再生季RC | 128.91±0.31 a | 106.68±0.89 a | 3.78±0.41 a | 27.95±0.25 a | -9.5±1.06 | ||
| 齐穗–灌浆中期 Heading–Mid-filling | 头季 MC | 42.13±5.12 b | 22.66±3.32 b | 3.21±2.95 b | 16.26±1.66 b | ||
| 再生季RC | 63.16±2.82 a | 41.18±3.45 a | 8.86±0.87 a | 19.02±3.82 a | -5.9±0.33 | ||
| 灌浆中期–成熟 Mid-filling–Maturity | 头季 MC | 43.10±7.03 b | 0.40±0.11 b | -4.52±0.61 b | 47.22±5.79 a | ||
| 再生季RC | 147.00±14.36 a | 83.51±4.30 a | 8.94±0.85 a | 17.95±2.65 b | 36.61±0.75 | ||
| 甬优4149 Yongyou 4149 | 齐穗前 Pre-heading | 头季 MC | 22.06±0.26 b | 16.02±0.41 b | 3.87±0.40 b | 2.17±0.28 b | |
| 再生季RC | 187.36±2.80 a | 128.36±1.44 a | 4.91±0.26 a | 31.41±0.55 a | 22.67±1.79 | ||
| 齐穗–灌浆中期 Heading–Mid-filling | 头季 MC | 20.36±1.03 b | -4.65±0.54 b | 4.05±0.88 a | 20.96±0.89 b | ||
| 再生季RC | 85.38±17.48 a | 82.04±0.93 a | 4.02±0.25 a | 33.76±2.28 a | -34.44±4.93 | ||
| 灌浆中期–成熟 Mid-filling–Maturity | 头季 MC | 84.63±18.55 a | 41.26±1.99 a | 4.55±5.11 b | 38.82±6.54 a | ||
| 再生季RC | 28.07±0.07 b | -26.39±0.47 b | 8.14±1.04 a | 3.98±0.58 b | 42.34±0.18 |
表6 头季与再生季各生育阶段的日均镉积累速率
Table 6 Daily Cd accumulation rate at different growth periods of main crop and ratooning crop. mg/(hm2·d)
| 品种 Variety | 生育阶段 Growth period | 季别 Season | 全株 Whole plant | 茎 Stem | 叶 Leaf | 穗 Panicle | 稻桩 Stubble |
|---|---|---|---|---|---|---|---|
| Y两优9918 Y Liangyou 9918 | 齐穗前 Pre-heading | 头季 MC | 12.66±0.16 b | 8.65±0.12 b | 2.86±0.05 b | 1.15±0.02 b | |
| 再生季RC | 128.91±0.31 a | 106.68±0.89 a | 3.78±0.41 a | 27.95±0.25 a | -9.5±1.06 | ||
| 齐穗–灌浆中期 Heading–Mid-filling | 头季 MC | 42.13±5.12 b | 22.66±3.32 b | 3.21±2.95 b | 16.26±1.66 b | ||
| 再生季RC | 63.16±2.82 a | 41.18±3.45 a | 8.86±0.87 a | 19.02±3.82 a | -5.9±0.33 | ||
| 灌浆中期–成熟 Mid-filling–Maturity | 头季 MC | 43.10±7.03 b | 0.40±0.11 b | -4.52±0.61 b | 47.22±5.79 a | ||
| 再生季RC | 147.00±14.36 a | 83.51±4.30 a | 8.94±0.85 a | 17.95±2.65 b | 36.61±0.75 | ||
| 甬优4149 Yongyou 4149 | 齐穗前 Pre-heading | 头季 MC | 22.06±0.26 b | 16.02±0.41 b | 3.87±0.40 b | 2.17±0.28 b | |
| 再生季RC | 187.36±2.80 a | 128.36±1.44 a | 4.91±0.26 a | 31.41±0.55 a | 22.67±1.79 | ||
| 齐穗–灌浆中期 Heading–Mid-filling | 头季 MC | 20.36±1.03 b | -4.65±0.54 b | 4.05±0.88 a | 20.96±0.89 b | ||
| 再生季RC | 85.38±17.48 a | 82.04±0.93 a | 4.02±0.25 a | 33.76±2.28 a | -34.44±4.93 | ||
| 灌浆中期–成熟 Mid-filling–Maturity | 头季 MC | 84.63±18.55 a | 41.26±1.99 a | 4.55±5.11 b | 38.82±6.54 a | ||
| 再生季RC | 28.07±0.07 b | -26.39±0.47 b | 8.14±1.04 a | 3.98±0.58 b | 42.34±0.18 |
| 器官 Organ | 季别 Season | Y两优9918 Y Liangyou 9918 | 甬优4149 Yongyou 4149 | ||||
|---|---|---|---|---|---|---|---|
| 齐穗期 Full heading | 灌浆中期 Mid-filling | 成熟期 Maturity | 齐穗期 Full heading | 灌浆中期 Mid-filling | 成熟期 Maturity | ||
| 茎Stem | 头季 MC | 0.11±0.01 b | 0.12±0.01 b | 0.19±0.01 b | 0.12±0.00 b | 0.16±0.01 b | 0.18±0.01 b |
| 再生季RC | 0.17±0.01 a | 0.28±0.01 a | 0.55±0.03 a | 0.33±0.02 a | 0.30±0.02 a | 0.55±0.03 a | |
| 叶Leaf | 头季 MC | 0.07±0.00 a | 0.06±0.01 a | 0.07±0.01 b | 0.05±0.01 a | 0.08±0.00 a | 0.08±0.00 b |
| 再生季RC | 0.01±0.00 b | 0.04±0.00 b | 0.12±0.01 a | 0.02±0.00 b | 0.03±0.00 b | 0.10±0.00 a | |
| 穗Panicle | 头季 MC | 0.06±0.00 a | 0.04±0.00 b | 0.10±0.01 a | 0.04±0.01 b | 0.05±0.00 b | 0.07±0.00 b |
| 再生季RC | 0.06±0.00 a | 0.07±0.00 a | 0.08±0.00 b | 0.14±0.01 a | 0.06±0.00 a | 0.08±0.00 a | |
表7 头季和再生季的镉转移系数
Table 7 Cd transfer coefficient of main crop and ratooning crop.
| 器官 Organ | 季别 Season | Y两优9918 Y Liangyou 9918 | 甬优4149 Yongyou 4149 | ||||
|---|---|---|---|---|---|---|---|
| 齐穗期 Full heading | 灌浆中期 Mid-filling | 成熟期 Maturity | 齐穗期 Full heading | 灌浆中期 Mid-filling | 成熟期 Maturity | ||
| 茎Stem | 头季 MC | 0.11±0.01 b | 0.12±0.01 b | 0.19±0.01 b | 0.12±0.00 b | 0.16±0.01 b | 0.18±0.01 b |
| 再生季RC | 0.17±0.01 a | 0.28±0.01 a | 0.55±0.03 a | 0.33±0.02 a | 0.30±0.02 a | 0.55±0.03 a | |
| 叶Leaf | 头季 MC | 0.07±0.00 a | 0.06±0.01 a | 0.07±0.01 b | 0.05±0.01 a | 0.08±0.00 a | 0.08±0.00 b |
| 再生季RC | 0.01±0.00 b | 0.04±0.00 b | 0.12±0.01 a | 0.02±0.00 b | 0.03±0.00 b | 0.10±0.00 a | |
| 穗Panicle | 头季 MC | 0.06±0.00 a | 0.04±0.00 b | 0.10±0.01 a | 0.04±0.01 b | 0.05±0.00 b | 0.07±0.00 b |
| 再生季RC | 0.06±0.00 a | 0.07±0.00 a | 0.08±0.00 b | 0.14±0.01 a | 0.06±0.00 a | 0.08±0.00 a | |
| 品种 Variety | 季别 Season | 空粒 Empty grain | 枝梗 Branch | 糙米 Brown rice | 颖壳 Glume |
|---|---|---|---|---|---|
| Y两优9918 Y Liangyou 9918 | 头季 MC | 0.06±0.00 b | 0.09±0.02 b | 0.07±0.01 a | 0.12±0.02 a |
| 再生季RC | 0.22±0.02 a | 0.12±0.01 a | 0.05±0.00 b | 0.08±0.01 b | |
| 甬优4149 Yongyou 4149 | 头季 MC | 0.08±0.01 b | 0.08±0.02 b | 0.06±0.00 a | 0.07±0.00 a |
| 再生季RC | 0.26±0.02 a | 0.13±0.01 a | 0.06±0.00 a | 0.07±0.00 a |
表8 头季与再生季成熟期穗各部位镉转移系数
Table 8 Cd transfer coefficient of different parts of panicles of main crop and ratooning crop.
| 品种 Variety | 季别 Season | 空粒 Empty grain | 枝梗 Branch | 糙米 Brown rice | 颖壳 Glume |
|---|---|---|---|---|---|
| Y两优9918 Y Liangyou 9918 | 头季 MC | 0.06±0.00 b | 0.09±0.02 b | 0.07±0.01 a | 0.12±0.02 a |
| 再生季RC | 0.22±0.02 a | 0.12±0.01 a | 0.05±0.00 b | 0.08±0.01 b | |
| 甬优4149 Yongyou 4149 | 头季 MC | 0.08±0.01 b | 0.08±0.02 b | 0.06±0.00 a | 0.07±0.00 a |
| 再生季RC | 0.26±0.02 a | 0.13±0.01 a | 0.06±0.00 a | 0.07±0.00 a |
| 品种 Variety | 季别 Season | 根 Root | 茎 Stem | 叶 Leaf | 穗 Panicle | 枝梗 Branch | 空粒 Empty grain | 颖壳 Glume | 糙米 Brown rice |
|---|---|---|---|---|---|---|---|---|---|
| Y两优9918 Y Liangyou 9918 | 头季 MC | 2.32±0.07 b | 0.44±0.02 b | 0.17±0.01 b | 0.24±0.02 b | 0.21±0.04 b | 0.15±0.00 b | 0.28±0.03 b | 0.17±0.02 b |
| 再生季RC | 5.47±0.10 a | 3.00±0.07 a | 0.67±0.02 a | 0.41±0.01 a | 1.19±0.01 a | 0.66±0.06 a | 0.45±0.00 a | 0.29±0.01 a | |
| 甬优4149 Yongyou 4149 | 头季 MC | 4.19±0.51 b | 0.74±0.01 b | 0.32±0.01 b | 0.28±0.02 b | 0.31±0.02 b | 0.32±0.01 b | 0.28±0.02 b | 0.23±0.03 b |
| 再生季RC | 5.56±0.55 a | 3.04±0.02 a | 0.56±0.02 a | 0.46±0.02 a | 1.43±0.01 a | 0.72±0.07 a | 0.39±0.01 a | 0.35±0.03 a |
表9 头季与再生季成熟期镉富集系数
Table 9 Cd enrichment factor at maturity of main crop and ratooning crop.
| 品种 Variety | 季别 Season | 根 Root | 茎 Stem | 叶 Leaf | 穗 Panicle | 枝梗 Branch | 空粒 Empty grain | 颖壳 Glume | 糙米 Brown rice |
|---|---|---|---|---|---|---|---|---|---|
| Y两优9918 Y Liangyou 9918 | 头季 MC | 2.32±0.07 b | 0.44±0.02 b | 0.17±0.01 b | 0.24±0.02 b | 0.21±0.04 b | 0.15±0.00 b | 0.28±0.03 b | 0.17±0.02 b |
| 再生季RC | 5.47±0.10 a | 3.00±0.07 a | 0.67±0.02 a | 0.41±0.01 a | 1.19±0.01 a | 0.66±0.06 a | 0.45±0.00 a | 0.29±0.01 a | |
| 甬优4149 Yongyou 4149 | 头季 MC | 4.19±0.51 b | 0.74±0.01 b | 0.32±0.01 b | 0.28±0.02 b | 0.31±0.02 b | 0.32±0.01 b | 0.28±0.02 b | 0.23±0.03 b |
| 再生季RC | 5.56±0.55 a | 3.04±0.02 a | 0.56±0.02 a | 0.46±0.02 a | 1.43±0.01 a | 0.72±0.07 a | 0.39±0.01 a | 0.35±0.03 a |
| 品种 Variety | 季别 Season | 茎 Stem | 叶 Leaf | 穗 Panicle | 稻桩 Stubble |
|---|---|---|---|---|---|
| Y两优9918 Y Liangyou 9918 | 头季 MC | 45.70±2.35 b | 9.27±0.30 a | 45.04±2.39 a | |
| 再生季RC | 65.74±1.45 a | 4.70±0.25 b | 15.28±0.29 b | 14.27±0.26 | |
| 甬优4149 Yongyou 4149 | 头季 MC | 55.08±1.45 a | 13.18±0.13 a | 31.74±1.32 a | |
| 再生季RC | 54.67±0.41 a | 4.47±0.18 b | 15.55±0.55 b | 25.31±0.05 |
表10 头季与再生季各器官镉分配系数
Table 10. Cd partition coefficient of different organs of main crop and ratooning crop. %
| 品种 Variety | 季别 Season | 茎 Stem | 叶 Leaf | 穗 Panicle | 稻桩 Stubble |
|---|---|---|---|---|---|
| Y两优9918 Y Liangyou 9918 | 头季 MC | 45.70±2.35 b | 9.27±0.30 a | 45.04±2.39 a | |
| 再生季RC | 65.74±1.45 a | 4.70±0.25 b | 15.28±0.29 b | 14.27±0.26 | |
| 甬优4149 Yongyou 4149 | 头季 MC | 55.08±1.45 a | 13.18±0.13 a | 31.74±1.32 a | |
| 再生季RC | 54.67±0.41 a | 4.47±0.18 b | 15.55±0.55 b | 25.31±0.05 |
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