Chinese Journal OF Rice Science ›› 2017, Vol. 31 ›› Issue (5): 500-512.DOI: 10.16819/j.1001-7216.2017.6145
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Na LI, Zhiyuan YANG, Zou DAI, Yongjian SUN, Hui XU, Yan HE, Mingjin JIANG, Tianrong YAN, Changchun GUO, Jun MA*()
Received:
2016-11-01
Revised:
2016-12-28
Online:
2017-10-10
Published:
2017-09-10
Contact:
Jun MA
李娜, 杨志远, 代邹, 孙永健, 徐徽, 何艳, 蒋明金, 严田蓉, 郭长春, 马均*()
通讯作者:
马均
基金资助:
CLC Number:
Na LI, Zhiyuan YANG, Zou DAI, Yongjian SUN, Hui XU, Yan HE, Mingjin JIANG, Tianrong YAN, Changchun GUO, Jun MA. Effects of Water-Nitrogen Management on Root Traits, Nitrogen Accumulation and Utilization and Grain Yield in Rice with Different Nitrogen Use Efficiency[J]. Chinese Journal OF Rice Science, 2017, 31(5): 500-512.
李娜, 杨志远, 代邹, 孙永健, 徐徽, 何艳, 蒋明金, 严田蓉, 郭长春, 马均. 水氮管理对不同氮效率水稻根系性状、氮素吸收利用及产量的影响[J]. 中国水稻科学, 2017, 31(5): 500-512.
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URL: http://www.ricesci.cn/EN/10.16819/j.1001-7216.2017.6145
施氮模式 N management mode | 施氮量及施氮时期 N application rate and stages | 总施氮量 Total N rate/(kg·hm-2) | |||
---|---|---|---|---|---|
基肥 Basal N/(kg·hm-2) | 蘖肥 N application for tillering /(kg·hm-2) | 促花肥 N application for spikelet boosting/(kg·hm-2) | 保花肥 N application for spikelet preserving/(kg·hm-2) | ||
SPAD指导施肥 SPAD-diagnosis N management | 0 | 自移栽后7 d至齐穗期,若叶绿素仪读数SPAD < 37.5,施氮15 kg/hm2,SPAD > 37.5,不施氮。其中,拔节期(倒4叶龄期),若SPAD < 37.5,施氮30 kg/hm2。每周测1 次。 | 120 | ||
优化施肥模式 Optimal N management | 45(30%) | 45(30%) | 30 (20%) | 30 (20%) | 150 |
农民习惯施肥 Farmer’s usual N management | 105(70%) | 45(30%) | 0 | 0 | 150 |
Table 1 N application rate and fertilization stage.
施氮模式 N management mode | 施氮量及施氮时期 N application rate and stages | 总施氮量 Total N rate/(kg·hm-2) | |||
---|---|---|---|---|---|
基肥 Basal N/(kg·hm-2) | 蘖肥 N application for tillering /(kg·hm-2) | 促花肥 N application for spikelet boosting/(kg·hm-2) | 保花肥 N application for spikelet preserving/(kg·hm-2) | ||
SPAD指导施肥 SPAD-diagnosis N management | 0 | 自移栽后7 d至齐穗期,若叶绿素仪读数SPAD < 37.5,施氮15 kg/hm2,SPAD > 37.5,不施氮。其中,拔节期(倒4叶龄期),若SPAD < 37.5,施氮30 kg/hm2。每周测1 次。 | 120 | ||
优化施肥模式 Optimal N management | 45(30%) | 45(30%) | 30 (20%) | 30 (20%) | 150 |
农民习惯施肥 Farmer’s usual N management | 105(70%) | 45(30%) | 0 | 0 | 150 |
品种 Cultivar | 灌溉方式Irrigation pattern | 施氮模式 N management mode | 有效穗数 Productive panicle number/(×104 hm-2) | 每穗粒数 Spikelet number per panicle | 结实率 Seed-setting rate /% | 千粒重 1000-grain weight /g | 总颖花量 Total spikelet Number/(×106 hm-2) | 产量 Grain yield /(kg·hm-2) |
---|---|---|---|---|---|---|---|---|
德香4103 Dexiang 4103(C1) | W1 | CK | 212.52±1.47 c | 142.58±2.31 c | 90.83±2.01 a | 33.43±0.60 a | 303.01±5.86 c | 9 135±334.75 c |
N1 | 235.10±10.11 b | 211.16±16.46 a | 83.92±0.68 b | 30.56±0.47 c | 496.21±40.90 a | 12 311±266.06 a | ||
N2 | 246.63±7.95 ab | 205.39±4.11 a | 80.74±2.67 b | 30.90±0.55 bc | 506.54±19.50 a | 12 077±114.48 a | ||
N3 | 252.20±4.93 a | 162.49±5.79 b | 90.72±2.80 a | 32.30±0.17 ab | 409.94±20.60 b | 11 500±401.06 b | ||
平均 Average | 236.61 | 180.41 | 86.55 | 31.80 | 428.92 | 11 256 | ||
W2 | CK | 193.72±3.70 c | 138.68±3.16 c | 91.24±2.40 a | 33.63±1.03 a | 268.66±11.11 c | 8 120±365.81 c | |
N1 | 234.15±4.52 b | 190.35±6.44 a | 84.61±2.51 c | 32.78±1.06 a | 445.57±10.86 a | 11 961±283.28 a | ||
N2 | 241.84±10.63 ab | 185.38±13.41 a | 85.76±0.74 bc | 32.82±0.16 a | 447.65±23.56 a | 12 239±341.80 a | ||
N3 | 249.09±8.14 a | 155.33±6.66 b | 88.06±1.40 ab | 34.43±1.53 a | 387.21±27.97 b | 11 351±134.61 b | ||
平均 Average | 229.70 | 167.44 | 87.42 | 33.41 | 387.27 | 10 918 | ||
宜香3724 Yixiang 3724(C2) | W1 | CK | 198.03±2.58 b | 131.20±3.42 b | 88.85±1.58 a | 36.34±1.01 a | 259.80±5.30 c | 8 373±147.22 c |
N1 | 235.18±10.44 a | 183.20±14.44 a | 84.48±2.22 b | 33.58±0.02 b | 430.48±32.50 a | 11 977±418.03 a | ||
N2 | 241.37±6.10 a | 178.67±6.04 a | 84.77±2.67 b | 34.42±0.19 b | 431.47±24.29 a | 12 048±200.90 a | ||
N3 | 246.25±10.00 a | 143.43±5.56 b | 89.16±0.61 a | 36.36±0.69 a | 352.91±8.82 b | 11 132±227.75 b | ||
平均 Average | 230.21 | 159.13 | 86.81 | 35.17 | 368.67 | 10 882 | ||
W2 | CK | 190.95±3.65 c | 117.47±2.01 c | 89.62±0.37 a | 36.76±0.53 ab | 224.31±6.59 c | 7 295±124.53 c | |
N1 | 229.79±4.93 b | 179.56±7.94 a | 81.11±1.21 b | 36.66±1.23 ab | 412.36±10.38 a | 11 887±305.06 a | ||
N2 | 238.10±11.19 ab | 175.79±3.66 a | 80.72±3.66 b | 35.33±0.85 b | 418.28±11.19 a | 11 621±233.07 a | ||
N3 | 243.05±11.10 a | 144.32±4.26 b | 88.05±1.68 a | 37.37±2.33 a | 350.94±23.67 b | 11 097±199.41 b | ||
平均 Average | 225.47 | 154.29 | 84.88 | 36.53 | 351.47 | 10 475 | ||
C1平均Average | 233.16 | 173.92 | 86.99 | 32.61 | 408.10 | 11 086.88 | ||
C2 平均Average | 227.84 | 156.71 | 85.84 | 35.85 | 360.07 | 10 678.71 | ||
F值F-value | 品种C | 3.83 ns | 35.53* | 5.66 ns | 3399.64** | 29.55* | 19.65* | |
灌溉方式W | 16.63* | 10.38* | 0.55 ns | 22.24** | 52.69** | 183.26** | ||
施氮模式N | 100.47** | 169.12** | 44.51** | 12.67** | 207.92** | 826.41** | ||
C×W | 0.58 ns | 2.16 ns | 3.71 ns | 0.17 ns | 9.10* | 1.59 ns | ||
C×N | 0.39 ns | 0.20 ns | 0.30 ns | 0.23 ns | 0.09 ns | 4.38* | ||
W×N | 1.19 ns | 0.90 ns | 1.31 ns | 3.02* | 0.89 ns | 13.01** | ||
C×W×N | 0.61 ns | 2.16 ns | 4.79** | 0.77 ns | 0.67 ns | 2.19 ns |
Table 2 Effects of water-nitrogen management on grain yield and its components in rice with different N use efficiencies.
品种 Cultivar | 灌溉方式Irrigation pattern | 施氮模式 N management mode | 有效穗数 Productive panicle number/(×104 hm-2) | 每穗粒数 Spikelet number per panicle | 结实率 Seed-setting rate /% | 千粒重 1000-grain weight /g | 总颖花量 Total spikelet Number/(×106 hm-2) | 产量 Grain yield /(kg·hm-2) |
---|---|---|---|---|---|---|---|---|
德香4103 Dexiang 4103(C1) | W1 | CK | 212.52±1.47 c | 142.58±2.31 c | 90.83±2.01 a | 33.43±0.60 a | 303.01±5.86 c | 9 135±334.75 c |
N1 | 235.10±10.11 b | 211.16±16.46 a | 83.92±0.68 b | 30.56±0.47 c | 496.21±40.90 a | 12 311±266.06 a | ||
N2 | 246.63±7.95 ab | 205.39±4.11 a | 80.74±2.67 b | 30.90±0.55 bc | 506.54±19.50 a | 12 077±114.48 a | ||
N3 | 252.20±4.93 a | 162.49±5.79 b | 90.72±2.80 a | 32.30±0.17 ab | 409.94±20.60 b | 11 500±401.06 b | ||
平均 Average | 236.61 | 180.41 | 86.55 | 31.80 | 428.92 | 11 256 | ||
W2 | CK | 193.72±3.70 c | 138.68±3.16 c | 91.24±2.40 a | 33.63±1.03 a | 268.66±11.11 c | 8 120±365.81 c | |
N1 | 234.15±4.52 b | 190.35±6.44 a | 84.61±2.51 c | 32.78±1.06 a | 445.57±10.86 a | 11 961±283.28 a | ||
N2 | 241.84±10.63 ab | 185.38±13.41 a | 85.76±0.74 bc | 32.82±0.16 a | 447.65±23.56 a | 12 239±341.80 a | ||
N3 | 249.09±8.14 a | 155.33±6.66 b | 88.06±1.40 ab | 34.43±1.53 a | 387.21±27.97 b | 11 351±134.61 b | ||
平均 Average | 229.70 | 167.44 | 87.42 | 33.41 | 387.27 | 10 918 | ||
宜香3724 Yixiang 3724(C2) | W1 | CK | 198.03±2.58 b | 131.20±3.42 b | 88.85±1.58 a | 36.34±1.01 a | 259.80±5.30 c | 8 373±147.22 c |
N1 | 235.18±10.44 a | 183.20±14.44 a | 84.48±2.22 b | 33.58±0.02 b | 430.48±32.50 a | 11 977±418.03 a | ||
N2 | 241.37±6.10 a | 178.67±6.04 a | 84.77±2.67 b | 34.42±0.19 b | 431.47±24.29 a | 12 048±200.90 a | ||
N3 | 246.25±10.00 a | 143.43±5.56 b | 89.16±0.61 a | 36.36±0.69 a | 352.91±8.82 b | 11 132±227.75 b | ||
平均 Average | 230.21 | 159.13 | 86.81 | 35.17 | 368.67 | 10 882 | ||
W2 | CK | 190.95±3.65 c | 117.47±2.01 c | 89.62±0.37 a | 36.76±0.53 ab | 224.31±6.59 c | 7 295±124.53 c | |
N1 | 229.79±4.93 b | 179.56±7.94 a | 81.11±1.21 b | 36.66±1.23 ab | 412.36±10.38 a | 11 887±305.06 a | ||
N2 | 238.10±11.19 ab | 175.79±3.66 a | 80.72±3.66 b | 35.33±0.85 b | 418.28±11.19 a | 11 621±233.07 a | ||
N3 | 243.05±11.10 a | 144.32±4.26 b | 88.05±1.68 a | 37.37±2.33 a | 350.94±23.67 b | 11 097±199.41 b | ||
平均 Average | 225.47 | 154.29 | 84.88 | 36.53 | 351.47 | 10 475 | ||
C1平均Average | 233.16 | 173.92 | 86.99 | 32.61 | 408.10 | 11 086.88 | ||
C2 平均Average | 227.84 | 156.71 | 85.84 | 35.85 | 360.07 | 10 678.71 | ||
F值F-value | 品种C | 3.83 ns | 35.53* | 5.66 ns | 3399.64** | 29.55* | 19.65* | |
灌溉方式W | 16.63* | 10.38* | 0.55 ns | 22.24** | 52.69** | 183.26** | ||
施氮模式N | 100.47** | 169.12** | 44.51** | 12.67** | 207.92** | 826.41** | ||
C×W | 0.58 ns | 2.16 ns | 3.71 ns | 0.17 ns | 9.10* | 1.59 ns | ||
C×N | 0.39 ns | 0.20 ns | 0.30 ns | 0.23 ns | 0.09 ns | 4.38* | ||
W×N | 1.19 ns | 0.90 ns | 1.31 ns | 3.02* | 0.89 ns | 13.01** | ||
C×W×N | 0.61 ns | 2.16 ns | 4.79** | 0.77 ns | 0.67 ns | 2.19 ns |
品种 Cultivar | 灌溉方式 Irrigation pattern | 施氮模式 N management mode | 氮积累量 N accumulation | 氮肥回收率 N recovery efficiency /% | 氮肥农学利用率 N agronomic efficiency /(kg·kg-1) | 氮肥生理利用率 N physiological efficiency /(kg·kg-1) |
---|---|---|---|---|---|---|
德香4103 Dexiang 4103(C1) | W1 | CK | 128.20±6.28 c | — | — | — |
N1 | 204.98±2.88 a | 63.98±4.04 a | 26.47±1.32 a | 41.41±1.95 a | ||
N2 | 205.41±2.56 a | 51.47±4.79 b | 19.61±1.98 b | 38.10±1.40 b | ||
N3 | 193.27±6.20 b | 43.38±5.11 c | 15.76±1.59 c | 36.40±1.21 b | ||
平均 Average | 182.97 | 52.95 | 20.61 | 38.64 | ||
W2 | CK | 112.16±7.42 c | — | — | — | |
N1 | 191.44±5.23 a | 66.07±5.57 a | 32.01±0.73 a | 48.65±3.65 a | ||
N2 | 198.88±4.84 a | 57.82±3.38 b | 27.46±2.31 b | 47.49±2.83 a | ||
N3 | 182.03±6.48 b | 46.58±2.55 c | 21.54±2.62 c | 46.12±3.17 a | ||
平均 Average | 171.13 | 56.82 | 27.00 | 47.42 | ||
宜香3724 Yixiang 3724(C2) | W1 | CK | 111.21±4.03 c | — | — | — |
N1 | 205.43±8.41 a | 78.52±9.97 a | 30.03±4.23 a | 38.21±1.03 a | ||
N2 | 207.89±2.54 a | 64.46±3.29 b | 24.5±2.30 b | 37.95±1.73 a | ||
N3 | 192.74±7.79 b | 54.35±6.04 c | 18.39±1.57 c | 33.92±1.60 b | ||
平均 Average | 179.32 | 65.78 | 24.31 | 36.69 | ||
W2 | CK | 96.44±2.89 c | — | — | — | |
N1 | 199.87±2.84 a | 86.19±4.1 a | 38.26±3.56 a | 44.34±2.17 a | ||
N2 | 192.88±0.84 ab | 64.29±1.82 b | 28.84±2.37 b | 44.81±2.58 a | ||
N3 | 187.39±6.43 b | 60.63±6.04 b | 25.35±2.04 c | 41.86±0.80 a | ||
平均 Average | 169.15 | 70.37 | 30.82 | 43.67 | ||
C1平均Average | 177.05 | 54.88 | 23.81 | 43.03 | ||
C2平均Average | 174.23 | 68.07 | 27.56 | 40.18 | ||
F值F-value | 品种C | 2.71 ns | 13.79 ns | 4.27 ns | 21.35* | |
灌溉方式W | 119.28** | 10.78* | 250.58** | 46.67** | ||
施氮模式N | 888.36** | 107.66** | 171.70** | 12.58** | ||
C×W | 0.69 ns | 0.08 ns | 0.02 ns | 0.61 ns | ||
C×N | 10.68** | 3.09 ns | 1.31 ns | 1.48 ns | ||
W×N | 1.17 ns | 0.21 ns | 0.21 ns | 1.12 ns | ||
C×W×N | 1.62 ns | 2.12 ns | 3.41 ns | 0.12 ns |
Table 3 Effects of water-nitrogen management on N accumulation and utilization in rice with different N use efficiencies.
品种 Cultivar | 灌溉方式 Irrigation pattern | 施氮模式 N management mode | 氮积累量 N accumulation | 氮肥回收率 N recovery efficiency /% | 氮肥农学利用率 N agronomic efficiency /(kg·kg-1) | 氮肥生理利用率 N physiological efficiency /(kg·kg-1) |
---|---|---|---|---|---|---|
德香4103 Dexiang 4103(C1) | W1 | CK | 128.20±6.28 c | — | — | — |
N1 | 204.98±2.88 a | 63.98±4.04 a | 26.47±1.32 a | 41.41±1.95 a | ||
N2 | 205.41±2.56 a | 51.47±4.79 b | 19.61±1.98 b | 38.10±1.40 b | ||
N3 | 193.27±6.20 b | 43.38±5.11 c | 15.76±1.59 c | 36.40±1.21 b | ||
平均 Average | 182.97 | 52.95 | 20.61 | 38.64 | ||
W2 | CK | 112.16±7.42 c | — | — | — | |
N1 | 191.44±5.23 a | 66.07±5.57 a | 32.01±0.73 a | 48.65±3.65 a | ||
N2 | 198.88±4.84 a | 57.82±3.38 b | 27.46±2.31 b | 47.49±2.83 a | ||
N3 | 182.03±6.48 b | 46.58±2.55 c | 21.54±2.62 c | 46.12±3.17 a | ||
平均 Average | 171.13 | 56.82 | 27.00 | 47.42 | ||
宜香3724 Yixiang 3724(C2) | W1 | CK | 111.21±4.03 c | — | — | — |
N1 | 205.43±8.41 a | 78.52±9.97 a | 30.03±4.23 a | 38.21±1.03 a | ||
N2 | 207.89±2.54 a | 64.46±3.29 b | 24.5±2.30 b | 37.95±1.73 a | ||
N3 | 192.74±7.79 b | 54.35±6.04 c | 18.39±1.57 c | 33.92±1.60 b | ||
平均 Average | 179.32 | 65.78 | 24.31 | 36.69 | ||
W2 | CK | 96.44±2.89 c | — | — | — | |
N1 | 199.87±2.84 a | 86.19±4.1 a | 38.26±3.56 a | 44.34±2.17 a | ||
N2 | 192.88±0.84 ab | 64.29±1.82 b | 28.84±2.37 b | 44.81±2.58 a | ||
N3 | 187.39±6.43 b | 60.63±6.04 b | 25.35±2.04 c | 41.86±0.80 a | ||
平均 Average | 169.15 | 70.37 | 30.82 | 43.67 | ||
C1平均Average | 177.05 | 54.88 | 23.81 | 43.03 | ||
C2平均Average | 174.23 | 68.07 | 27.56 | 40.18 | ||
F值F-value | 品种C | 2.71 ns | 13.79 ns | 4.27 ns | 21.35* | |
灌溉方式W | 119.28** | 10.78* | 250.58** | 46.67** | ||
施氮模式N | 888.36** | 107.66** | 171.70** | 12.58** | ||
C×W | 0.69 ns | 0.08 ns | 0.02 ns | 0.61 ns | ||
C×N | 10.68** | 3.09 ns | 1.31 ns | 1.48 ns | ||
W×N | 1.17 ns | 0.21 ns | 0.21 ns | 1.12 ns | ||
C×W×N | 1.62 ns | 2.12 ns | 3.41 ns | 0.12 ns |
根系性状 Root trait | 标准回归系数Standard regression coefficient | ||||||||
---|---|---|---|---|---|---|---|---|---|
拔节期 Jointing stage | 抽穗期Heading stage | 成熟期Maturity stage | |||||||
氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | ||||
根总干质量Total root dry weight | -0.0135 | -0.019 | 0.1875 | 0.1056 | -0.0679 | -0.0142 | |||
不定根Adventitious root | |||||||||
0.1110 | 0.0653 | 0.0698 | -0.0331 | 0.2415 | 0.4472 | ||||
0.2074 | 0.0538 | 0.0437 | 0.1587 | 0.0127 | 0.1910 | ||||
-0.1432 | -0.0422 | 0.0019 | -0.006 | 0.1872 | 0.0051 | ||||
粗分枝根Coarse lateral root | |||||||||
长度Length 表面积Surface area 体积Volume | 0.2971 | 0.1153 | 0.2625 | 0.0352 | -0.1532 | -0.0744 | |||
0.1718 | 0.2337 | 0.0138 | 0.0552 | 0.1450 | 0.2821 | ||||
-0.0805 | -0.1707 | 0.1236 | -0.0037 | -0.0953 | -0.2173 | ||||
细分枝根Fine lateral root | |||||||||
长度Length 表面积Surface area 体积Volume | 0.3316 | 0.4615 | 0.0512 | 0.0130 | 0.2036 | -0.2006 | |||
0.1496 | 0.1212 | -0.0216 | 0.3743 | 0.1022 | -0.0281 | ||||
-0.0537 | -0.0096 | 0.0144 | 0.1180 | -0.1059 | 0.0025 | ||||
决定系数Determination coefficient | 0.7204** | 0.6292** | 0.9009** | 0.9028** | 0.4587** | 0.4198** |
Table 7 Ridge regression analysis between grain yield and root traits at different stages in rice with different N use efficiencies.
根系性状 Root trait | 标准回归系数Standard regression coefficient | ||||||||
---|---|---|---|---|---|---|---|---|---|
拔节期 Jointing stage | 抽穗期Heading stage | 成熟期Maturity stage | |||||||
氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | ||||
根总干质量Total root dry weight | -0.0135 | -0.019 | 0.1875 | 0.1056 | -0.0679 | -0.0142 | |||
不定根Adventitious root | |||||||||
0.1110 | 0.0653 | 0.0698 | -0.0331 | 0.2415 | 0.4472 | ||||
0.2074 | 0.0538 | 0.0437 | 0.1587 | 0.0127 | 0.1910 | ||||
-0.1432 | -0.0422 | 0.0019 | -0.006 | 0.1872 | 0.0051 | ||||
粗分枝根Coarse lateral root | |||||||||
长度Length 表面积Surface area 体积Volume | 0.2971 | 0.1153 | 0.2625 | 0.0352 | -0.1532 | -0.0744 | |||
0.1718 | 0.2337 | 0.0138 | 0.0552 | 0.1450 | 0.2821 | ||||
-0.0805 | -0.1707 | 0.1236 | -0.0037 | -0.0953 | -0.2173 | ||||
细分枝根Fine lateral root | |||||||||
长度Length 表面积Surface area 体积Volume | 0.3316 | 0.4615 | 0.0512 | 0.0130 | 0.2036 | -0.2006 | |||
0.1496 | 0.1212 | -0.0216 | 0.3743 | 0.1022 | -0.0281 | ||||
-0.0537 | -0.0096 | 0.0144 | 0.1180 | -0.1059 | 0.0025 | ||||
决定系数Determination coefficient | 0.7204** | 0.6292** | 0.9009** | 0.9028** | 0.4587** | 0.4198** |
氮素吸收利用 N accumulation and utilization | 决定系数 Determination coefficient | |||||||
---|---|---|---|---|---|---|---|---|
拔节期 Jointing stage | 抽穗期 Heading stage | 成熟期 Maturity stage | ||||||
氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | |||
氮积累量 N accumulation | 0.4596 | 0.4945 | 0.6892 | 0.6917 | 0.4036 | 0.4078 | ||
氮肥回收率 N recovery efficiency | 0.3801 | 0.4244 | 0.4491 | 0.5722 | 0.3437 | 0.4308 | ||
氮肥农学利用率 N agronomic efficiency efficiency | 0.3226 | 0.2638 | 0.3451 | 0.4263 | 0.3140 | 0.4197 | ||
氮肥生理利用率 N physiological efficiency efficiency | 0.0720 | 0.1077 | 0.2243 | 0.0928 | 0.2519 | 0.4161 |
Table 8 Ridge regression analysis between root traits at different stages and N accumulation and utilization in rice with different N use efficiencies.
氮素吸收利用 N accumulation and utilization | 决定系数 Determination coefficient | |||||||
---|---|---|---|---|---|---|---|---|
拔节期 Jointing stage | 抽穗期 Heading stage | 成熟期 Maturity stage | ||||||
氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | 氮高效HN | 氮低效LN | |||
氮积累量 N accumulation | 0.4596 | 0.4945 | 0.6892 | 0.6917 | 0.4036 | 0.4078 | ||
氮肥回收率 N recovery efficiency | 0.3801 | 0.4244 | 0.4491 | 0.5722 | 0.3437 | 0.4308 | ||
氮肥农学利用率 N agronomic efficiency efficiency | 0.3226 | 0.2638 | 0.3451 | 0.4263 | 0.3140 | 0.4197 | ||
氮肥生理利用率 N physiological efficiency efficiency | 0.0720 | 0.1077 | 0.2243 | 0.0928 | 0.2519 | 0.4161 |
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