Effects of Hybrid Rice Seedling Quality in Drill-seeding Nursery on Grain Yield in Mechanical Transplanting

doi:10.16819/j.1001-7216.2025.240405

Abstract

Abstract:

【Objective】Precision drill sowing improves the quality of machine-transplanted seedlings and enhances population uniformity. This study aims to clarify the relationship between seedling quality of hybrid rice under drill sowing and yield formation in mechanized transplanting, thereby guiding the establishment of high-yield populations. 【Method】Using indica-japonica hybrid rice “Yongyou 1538”, three drill specifications (D₁: 16 rows, D₂: 18 rows, D₃: 20 rows) and three seed usages (seeds per hole, S₁: 3, S2: 4, S₃: 5) were tested. Each seeding tray was sown 40 times horizontally, with vertical sowing times matching the drill number. Seedling quality, tillering dynamics, leaf area index (LAI), dry matter accumulation, panicle traits, yield, and their components were analyzed. 【Result】 (1) Few drill rows and fewer seeds per hole improved seedling quality, promoting tillering at the 2nd and 3rd leaf positions. The more seeds per hole reduced productive panicle rate. (2) Fewer drills increased LAI and dry matter accumulation. Higher seeds per hole lowered harvest index. (3) Fewer seeds per hole increased grains per panicle and partially improved seed-setting rate. Fewer drills enhanced seed-setting rate of secondary branches. (4) D₁ yield exceeded D₂ and D₃ by 5.0% and 10.8%, respectively; S₂ (4 seeds per hole) yield surpassed S₁ and S₃ by 6.0% and 7.1%. (5) Yield correlated most strongly with seedling fullness (13.94 g increase per 1 mg/cm). 【Conclusion】Robust seedlings enhance low-position tillering. Seedling fullness is a key indicator of seedling vigor, achievable through reduced seeding rates. Under identical basic seedlings, robust seedlings improve LAI and dry matter accumulation, increasing yield via productive panicles.

Key words: hybrid rice, machine-transplanted rice seedling, seedling quality, yield

摘要：

【目的】精准条播育秧可提升机插秧苗素质与群体均匀度。本研究旨在阐明杂交稻条播育秧秧苗素质与机插产量间的关系，为构建高产群体提供理论依据。【方法】本研究选用籼粳杂交稻甬优1538为供试品种，设置3个条播规格(D1：16条，D2：18条，D3：20条)和3个每穴播种粒数（S1：3粒，S2：4粒，S3：5粒）处理。播种规格为每个秧盘横向播种40次，纵向播种次数与播种条数相对应。分析比较了不同处理下水稻的秧苗素质、群体分蘖动态、叶面积指数、干物质积累、穗部性状、产量及其构成要素。【结果】 (1)每穴播种粒数和播种条数越少，秧苗素质越高；秧苗素质提高有利于增加移栽后秧苗第2、第3叶位分蘖的发生比例和单株分蘖力；每穴播种粒数越高，群体成穗率越低。(2)每穴播种粒数相同条件下，降低播种条数使群体的叶面积指数和地上部干物质量增加；每穴播种粒数越多，群体收获指数越低。(3)减少每穴播种粒数，增加了每穗粒数，并对籽粒的结实率起到促进作用；通过减少播种条数能有效提高二次枝梗着粒的结实率。(4)降低播种条数可以使产量增加，D₁的平均产量较D₂、D₃分别提升5.0%、10.8%；每穴播种粒数为4粒时，群体产量较高，S₂的平均产量较S₁、S₃的分别提升6.0%、7.1%。(5)单株产量与秧苗充实度的相关性最高，秧苗充实度每提升1 mg/cm，单株产量提高13.94 g。【结论】壮秧能够提高机插秧苗低位分蘖的比例，秧苗充实度可作为判断秧苗素质的重要指标，降低播种量是促进壮秧的最有效措施。在相同基本苗下，机插壮秧提高了群体的叶面积指数和干物质积累量，通过提高有效穗数而获得高产。

关键词: 杂交稻, 机插秧, 秧苗素质, 产量

TANG Chenghan, WANG Jingqing, CHEN Huizhe, ZHANG Yuping, XIANG Jing, ZHANG Yikai, WANG Zhigang, HUAI Yan, CHEN Jiafeng, WANG Yaliang. Effects of Hybrid Rice Seedling Quality in Drill-seeding Nursery on Grain Yield in Mechanical Transplanting[J]. Chinese Journal OF Rice Science, 2025, 39(2): 245-254.

唐承翰, 王晶卿, 陈惠哲, 张玉屏, 向镜, 张义凯, 王志刚, 怀燕, 陈佳峰, 王亚梁. 杂交稻条播育秧机插秧苗素质对产量的影响[J]. 中国水稻科学, 2025, 39(2): 245-254.

Figures/Tables 10

References 27

[1]	王瑞峰, 李爽, 孔凡娜. 粮食安全保障能力:内涵特征、指标测度与提升路径[J]. 四川农业大学学报, 2022, 40(3): 301-311.
	Wang R F, Li S, Kong F N. Food security capacity: connotation characteristics, index measurement and promotion path[J]. Journal of Sichuan Agricultural University, 2022, 40(3): 301-311. (in Chinese with English abstract)
[2]	李泽华, 马旭, 李秀昊, 陈林涛, 李宏伟, 袁志成. 水稻栽植机械化技术研究进展[J]. 农业机械学报, 2018, 49(5): 1-20.
	Li Z H, Ma X, Li X H, Chen L T, Li H W, Yuan Z C. Research progress of rice transplanting mechanization[J]. Transactions of the Chinese Society for Agricultural Machinery, 2018, 49(5): 1-20. (in Chinese)
[3]	Zhang G Q. Prospects of utilization of inter-subspecific heterosis between indica and japonica rice[J]. Journal of Integrative Agriculture, 2020, 19(1): 1-10.
[4]	应伟杰, 王亚梁, 朱德峰, 怀燕, 张玉屏, 向镜, 陈惠哲. 水稻机械育插秧技术研究进展[J]. 中国稻米, 2024, 30(4): 12-16.
	Ying W J, Wang Y L, Zhu D F, Huai Y, Zhang Y P, Xiang J, Chen H Z. Research progress of rice transplanting mechanization[J]. China Rice, 2024, 30(4): 12-16. (in Chinese with English abstract)
[5]	李博, 袁玉洁, 何辰延, 周星, 李秋萍, 朱莜芸, 何宇欣, 黄小凡, 艾小凤, 陈勇, 周伟, 程红, 王丽, 肖洪, 任万军, 邓飞. “减穴稳苗” 田间配置对西南稻区水稻冠层结构和光能分布的影响[J]. 四川农业大学学报, 2023, 41(2): 266-274.
	Li B, Yuan Y J, He C Y, Zhou X, Li Q P, Zhu Y Y, He Y X, Huang X F, Ai X F, Chen Y, Zhou W, Cheng H, Wang L, Xiao H, Ren W J, Deng F. Effects of field configuration of ‘increasing the number of seedlings per hill with reduced number of hills’ on rice canopy structure and light energy distribution characteristics of indica hybrid rice in the southwest China[J]. Journal of Sichuan Agricultural University, 2023, 41(2): 266-274. (in Chinese with English abstract)
[6]	魏颖娟, 赵杨, 邹应斌. 不同穗型超级稻品种籽粒灌浆特性[J]. 作物学报, 2016, 42(10): 1516-1529.
	Wei Y J, Zhao Y, Zou Y B. Grain-filling characteristics in super rice with different panicle types[J]. Acta Agronomica Sinica, 2016, 42(10): 1516-1529. (in Chinese with English abstract)
[7]	隗溟, 廖学群, 李冬霞, 段海龙. 水稻分蘖节位生产力比较[J]. 植物生态学报, 2012, 36(4): 324-332.
	Kui M, Liao X Q, Li D X, Duan H L. Comparison of tillering productivity among nodes along the Mian stem of rice[J]. Chinese Journal of Plant Ecology, 2012, 36(4): 324-332. (in Chinese with English abstract)
[8]	贾旋, 宋建农, 王继承, 曹晓林, 刘彩玲, 万里鹏程, 郑慧娜, 徐泽昕. 秧龄和基土比对机插大钵体毯状苗晚稻群体质量和产量的影响[J]. 农业工程学报, 2022, 38(12): 1-11.
	Jia X, Song J N, Wang J C, Cao X L, Liu C L, Wan L, Zheng H N, Xu Z X. Effects of seedling age and substrate soil ratio on the population quality and yield of late rice of machine-transplanted large-pot carpet seedlings[J]. Transactions of the Chinese Society of Agricultural Engineering, 2022, 38(12): 1-11. (in Chinese with English abstract)
[9]	董玉兵, 孙春梅, 董青君, 陈川, 纪力, 庄春. 不同铵硝配比肥对水稻秧苗素质及土壤养分变化的影响[J]. 西南农业学报, 2023, 36(10): 2183-2190.
	Dong Y B, Sun C M, Dong Q J, Chen C, Ji L, Zhuang C. Effect of fertilizer with different ammonia-nitrate ratio on rice seedling quality and soil nutrient[J]. Southwest China Journal of Agricultural Sciences, 2023, 36(10): 2183-2190. (in Chinese with English abstract)
[10]	周海波, 李晨铭, 张镔, 王海欣, 李霞. 水稻钵体育秧智能补种决策方法与试验[J]. 农业机械学报, 2020, 51(12): 122-129.
	Zhou H B, Li C M, Zhang B, Wang H X, Li X. Decision and experiment on intelligent reseeding system of rice bowl nursing seedling[J]. Transactions of the Chinese Society for Agricultural Machinery, 2020, 51(12): 122-129. (in Chinese with English abstract)
[11]	张桥, 向开宏, 孙永健, 武云霞, 郭长春, 唐源, 刘芳艳, 马均. 不同育秧方式下播种量和插秧机具对水稻产量及群体质量的影响[J]. 核农学报, 2020, 34(11): 2595-2606.
	Zhang Q, Xiang K H, Sun Y J, Wu Y X, Guo C C, Tang Y, Liu F Y, Ma J. Effects of seeding amount and transplanting machines on rice yield and population quality under different seedling raising methods[J]. Journal of Nuclear Agricultural Sciences, 2020, 34(11): 2595-2606. (in Chinese with English abstract)
[12]	安之冬, 管浩, 朱远芃, 柴如山, 郜红建, 华胜, 王宜坤. 育秧基质配施腐植酸对水稻秧苗素质及产量的影响[J]. 中国土壤与肥料, 2022(6): 173-181.
	An Z D, Guan H, Zhu Y P, Chai R S, Gao H J, Hua S, Wang Y K. Effects of combined application of humic acid with seedling raising substrate on seedling quality and rice yield[J]. Soil and Fertilizer Sciences in China, 2022(6): 173-181. (in Chinese with English abstract)
[13]	方文英, 朱德峰, 怀燕, 陈佳麒, 陈惠哲, 王亚梁. 精准条播育秧提高单季杂交稻机插稀植群体产量的效应分析[J]. 作物杂志, 2023(5): 124-130.
	Fang W Y, Zhu D F, Huai Y, Chen J Q, Chen H Z, Wang Y L. Analysis on the effects of precision drill sowing in machine transplanting for single-season hybrid rice to improve yield of sparsely planted population[J]. Crops, 2023(5): 124-130. (in Chinese with English abstract)
[14]	王亚梁, 朱德峰, 向镜, 陈惠哲, 张玉屏, 徐一成, 张义凯. 杂交稻低播量精量播种育秧及机插取秧特性[J]. 中国水稻科学, 2020, 34(4): 332-338.
	Wang Y L, Zhu D F, Xiang J, Chen H Z, Zhang Y B, Xu Y C, Zhang Y K. Characteristics of seedling raising and mechanized transplanting of hybrid rice with a low seeding rate by precise seeding method[J]. Chinese Journal of Rice Science, 2020, 34(4): 332-338. (in Chinese with English abstract)
[15]	王亚梁, 朱德峰, 陈若霞, 方文英, 王晶卿, 向镜, 陈惠哲, 张玉屏, 谌江华. 杂交稻低播量精准条播育秧机插提高群体均匀度和产量的效应分析[J]. 中国农业科学, 2022, 55(4): 666-679.
	Wang Y L, Zhu D F, Chen R X, Fang W Y, Wang J Q, Xiang J, Chen H Z, Zhang Y B, Chen J H. Beneficial effects of precision drill sowing with low seeding rates in machine transplanting for hybrid rice to improve population uniformity and yield[J]. Scientia Agricultura Sinica, 2022, 55(4): 666-679. (in Chinese with English abstract)
[16]	蒋明金, 李敏, 罗德强, 周维佳, 江学海, 姬广梅, 李立江. 播种量对不同粒型机插优质杂交籼稻秧苗素质、机插质量及产量的影响[J]. 四川农业大学学报, 2020, 38(4): 399-408, 422.
	Jiang M J, Li M, Luo D Q, Zhou W J, Jiang X H, Ji G M, Li L J. Effect of seeding rate on seedling quality, transplanting quality and grain yield of mechanical transplanted high-quality indica rice with different grain shape[J]. Journal of Sichuan Agricultural University, 2020, 38(4): 399-408, 422. (in Chinese with English abstract)
[17]	吕伟生, 曾勇军, 石庆华, 潘晓华, 黄山, 商庆银, 谭雪明, 李木英, 胡水秀. 机插早稻分蘖成穗特性及基本苗公式参数研究[J]. 作物学报, 2016, 42(3): 427-436.
	Lü W S, Zeng Y J, Shi Q H, Pan X H, Huang S, Shang Q Y, Tan X M, Li M Y, Hu S X. Tillering and panicle formation characteristics of machine-transplanted early rice and its parameters of basic population formulae[J]. Acta Agronomica Sinica, 2016, 42(3): 427-436. (in Chinese with English abstract)
[18]	李泽华, 马旭, 陈林涛, 李宏伟, 黄益强, 黎俊荣, 罗国武, 姚俊豪. 育秧播种密度与取秧面积耦合对杂交稻机插质量和产量的影响[J]. 农业工程学报, 2019, 35(24): 20-30.
	Li Z H, Ma X, Chen L T, Li H W, Huang Y Q, Li J R, Luo G W, Yao J H. Effects of coupling of nursing seedling densities and seedling fetching area on transplanting quality and yield of hybrid rice[J]. Transactions of the Chinese Society of Agricultural Engineering, 2019, 35(24): 20-30. (in Chinese with English abstract)
[19]	刘杨, 王强盛, 丁艳锋, 王绍华. 水稻分蘖发生机理的研究进展[J]. 中国农学通报, 2011, 27(3): 1-5.
	Liu Y, Wang Q S, Ding Y F, Wang S H. Advances in mechanisms of tiller occurs in rice[J]. Chinese Agricultural Science Bulletin, 2011, 27(3): 1-5. (in Chinese with English abstract)
[20]	顾俊荣, 韩立宇, 董明辉, 陈培峰, 乔中英. 不同穗型粳稻干物质运转与颖花形成及籽粒灌浆结实的差异研究[J]. 扬州大学学报: 农业与生命科学版, 2017, 38(4): 68-73, 88.
	Gu J Y, Han L Y, Dong M H, Chen P F, Qiao Z Y. Studies on the difference of dry matter accumulation and transportation,spikelets formation and the grain filling of japonica rice varieties with different panicle types[J]. Journal of Yangzhou University: Agricultural and Life Sciences Edition, 2017, 38(4): 68-73, 88. (in Chinese with English abstract)
[21]	张洪程, 邢志鹏, 翁文安, 田晋钰, 陶钰, 程爽, 胡群, 胡雅杰, 郭保卫, 魏海燕. 生育约束型直播水稻生育特征与稳产关键技术[J]. 中国农业科学, 2021, 54(7): 1322-1337.
	Zhang H C, Xing Z P, Weng W A, Tian J Y, Tao Y, Cheng S, Hu Q, Hu Y J, Guo B W, Wei H Y. Growth characteristics and key techniques for stable yield of growth constrained direct seeding rice[J]. Scientia Agricultura Sinica, 2021, 54(7): 1322-1337. (in Chinese with English abstract)
[22]	宋云生, 张洪程, 戴其根, 杨大柳, 郭保卫, 朱聪聪, 霍中洋, 许轲, 魏海燕, 胡加敏, 吴爱国, 蒋晓鸿. 水稻机栽钵苗单穴苗数对分蘖成穗及产量的影响[J]. 农业工程学报, 2014, 30(10): 37-47.
	Song Y S, Zhang H C, Dai Q G, Yang D L, Guo B W, Zhu C C, Huo Z Y, Xu K, Wei H Y, Hu J M, Wu A G, Jiang X H. Effect of rice potted-seedlings per hole by mechanical transplanting on tillers emergence, panicles formation and yield[J]. Transactions of the Chinese Society of Agricultural Engineering, 2014, 30(10): 37-47. (in Chinese with English abstract)
[23]	袁奇, 于林惠, 石世杰, 邵建国, 丁艳锋. 机插秧每穴栽插苗数对水稻分蘖与成穗的影响[J]. 农业工程学报, 2007, 23(10): 121-125.
	Yuan Q, Yu L H, Shi S J, Shao J G, Ding Y F. Effects of different quantities of planting seedlings per hill on outgrowth and tiller production for machine-transplanted rice[J]. Transactions of the Chinese Society of Agricultural Engineering, 2007, 23(10): 121-125. (in Chinese with English abstract)
[24]	宋云生, 张洪程, 戴其根, 霍中洋, 许轲, 魏海燕, 朱聪聪, 孙圳, 杨大柳, 王惟清, 刘俊, 吴爱国. 水稻钵苗机插秧苗素质的调控[J]. 农业工程学报, 2013, 29(22): 11-22.
	Song Y S, Zhang H C, Dai Q G, Huo Z Y, Xu K, Wei H Y, Zhu C C, Sun Z, Yang D L, Wang W Q, Liu J, Wu A G. Seedling quality regulation of rice potted-seedling in mechanical transplanting[J]. Transactions of the Chinese Society of Agricultural Engineering, 2013, 29(22): 11-22. (in Chinese with English abstract)
[25]	胡剑锋, 杨波, 周伟, 张培培, 张强, 李培程, 任万军, 杨文钰. 播种方式和播种密度对杂交籼稻机插秧节本增效的研究[J]. 中国水稻科学, 2017, 31(1): 81-90.
	Hu J F, Yang B, Zhou W, Zhang P P, Zhang Q, Li P C, Ren W J, Yang W Y. Effect of seeding method and density on the benefit of mechanical transplanting in indica hybrid rice[J]. Chinese Journal of Rice Science, 2017, 31(1): 81-90. (in Chinese with English abstract)
[26]	李锦涛, 胡洋, 李炫, 丁紫娟, 杨朔, 聂玺斌, 黄飞, 侯俊, 曹兵. 控释尿素接触施用对水稻秧苗生长的影响[J]. 中国土壤与肥料, 2023(1): 57-64.
	Li J T, Hu Y, Li X, Ding Z J, Yang S, Nie X B, Huang F, Hou J, Cao B. Effects of contact application of controlled-release urea for rice seedling raising and optimized methods on seedling growth[J]. Soil and Fertilizer Sciences in China, 2023(1): 57-64. (in Chinese with English abstract)
[27]	Feng Y, Liu M, Wang K, Ling Y, Hu Q, Zhang H, Zhang H. Optimal seeding rate enhances seedling quality, mechanical transplanting quality, and yield in hybrid rice[J]. Frontiers in Plant Science, 2024, 15: 1427972.

处理 Treatment	条播播种规格 Drill seeding specification	每穴播种粒数 Number of seeds sown per hole	每盘播种量 Seeding amount per tray(g)	每穴种植苗数 Seedlings per hole
S₁D₁	16	3	44.16	2
S₁D₂	18	3	49.68	2
S₁D₃	20	3	55.20	2
S₂D₁	16	4	58.88	3
S₂D₂	18	4	66.24	3
S₂D₃	20	4	73.60	3
S₃D₁	16	5	73.60	4
S₃D₂	18	5	82.80	4
S₃D₃	20	5	92.00	4

处理 Treatment	条播播种规格 Drill seeding specification	每穴播种粒数 Number of seeds sown per hole	每盘播种量 Seeding amount per tray(g)	每穴种植苗数 Seedlings per hole
S₁D₁	16	3	44.16	2
S₁D₂	18	3	49.68	2
S₁D₃	20	3	55.20	2
S₂D₁	16	4	58.88	3
S₂D₂	18	4	66.24	3
S₂D₃	20	4	73.60	3
S₃D₁	16	5	73.60	4
S₃D₂	18	5	82.80	4
S₃D₃	20	5	92.00	4

每穴播种粒数 Number of seeds per hole	播种条数 Number of drill sowing	叶龄 Leaf age	苗高 Seeding height(cm)	茎基宽 Stem base width(mm)	根长 Root length(cm)	根数 Number of roots	百株苗干物质量 Dry matter weight of 100 seedlings(g)	秧苗充实度 Fullness of seedling(mg/cm)
S₁	D₁	3.41±0.12 a	15.97±0.29 a	2.94±0.12 a	11.50±0.51 a	13.67±0.85 a	4.76±0.17 a	2.39±0.12 a
	D₂	3.31±0.04 ab	16.27±0.26 a	2.79±0.16 ab	10.76±0.51 b	12.90±0.70 a	4.65±0.17 a	2.29±0.08 ab
	D₃	3.24±0.12 b	16.41±0.34 a	2.65±0.14 b	10.30±0.25 b	11.40±0.56 b	4.41±0.34 a	2.15±0.19 b
S₂	D₁	3.11±0.10 a	16.29±0.36 a	2.58±0.07 a	10.02±0.28 a	11.23±0.50 a	4.02±0.21 a	1.98±0.15 a
	D₂	3.02±0.09 a	16.52±0.39 a	2.43±0.08 ab	9.68±0.16 a	10.40±0.56 ab	3.79±0.33 ab	1.84±0.12 ab
	D₃	3.00±0.03 a	16.84±0.32 a	2.33±0.06 b	9.57±0.10 a	10.10±0.60 b	3.55±0.28 b	1.69±0.15 b
S₃	D₁	3.02±0.07 a	16.67±0.43 a	2.33±0.08 a	9.54±0.24 a	9.93±0.65 a	3.33±0.29 a	1.60±0.17 a
	D₂	2.95±0.08 a	16.84±0.61 a	2.23±0.06 ab	9.27±0.23 a	9.47±0.35 a	3.19±0.18 a	1.52±0.08 a
	D₃	2.79±0.06 b	17.29±0.44 a	2.13±0.09 b	9.05±0.24 a	9.07±0.35 a	3.09±0.18 a	1.43±0.06 a
每穴播种粒数(S) Number of seeds per hole		81.420^**	61.256^**	399.148^**	41.902^**	45.056^**	366.592^**	472.400^**
播种条数(D) Number of sowing rows		13.800^*	34.331^**	75.287^**	8.396^*	8.805^*	23.879^**	44.576^**
每穴粒数×播种条数 S×D		0.654	0.121	0.185	1.447	1.493	0.198	0.161

每穴播种粒数 Number of seeds per hole	播种条数 Number of drill sowing	叶龄 Leaf age	苗高 Seeding height(cm)	茎基宽 Stem base width(mm)	根长 Root length(cm)	根数 Number of roots	百株苗干物质量 Dry matter weight of 100 seedlings(g)	秧苗充实度 Fullness of seedling(mg/cm)
S₁	D₁	3.41±0.12 a	15.97±0.29 a	2.94±0.12 a	11.50±0.51 a	13.67±0.85 a	4.76±0.17 a	2.39±0.12 a
	D₂	3.31±0.04 ab	16.27±0.26 a	2.79±0.16 ab	10.76±0.51 b	12.90±0.70 a	4.65±0.17 a	2.29±0.08 ab
	D₃	3.24±0.12 b	16.41±0.34 a	2.65±0.14 b	10.30±0.25 b	11.40±0.56 b	4.41±0.34 a	2.15±0.19 b
S₂	D₁	3.11±0.10 a	16.29±0.36 a	2.58±0.07 a	10.02±0.28 a	11.23±0.50 a	4.02±0.21 a	1.98±0.15 a
	D₂	3.02±0.09 a	16.52±0.39 a	2.43±0.08 ab	9.68±0.16 a	10.40±0.56 ab	3.79±0.33 ab	1.84±0.12 ab
	D₃	3.00±0.03 a	16.84±0.32 a	2.33±0.06 b	9.57±0.10 a	10.10±0.60 b	3.55±0.28 b	1.69±0.15 b
S₃	D₁	3.02±0.07 a	16.67±0.43 a	2.33±0.08 a	9.54±0.24 a	9.93±0.65 a	3.33±0.29 a	1.60±0.17 a
	D₂	2.95±0.08 a	16.84±0.61 a	2.23±0.06 ab	9.27±0.23 a	9.47±0.35 a	3.19±0.18 a	1.52±0.08 a
	D₃	2.79±0.06 b	17.29±0.44 a	2.13±0.09 b	9.05±0.24 a	9.07±0.35 a	3.09±0.18 a	1.43±0.06 a
每穴播种粒数(S) Number of seeds per hole		81.420^**	61.256^**	399.148^**	41.902^**	45.056^**	366.592^**	472.400^**
播种条数(D) Number of sowing rows		13.800^*	34.331^**	75.287^**	8.396^*	8.805^*	23.879^**	44.576^**
每穴粒数×播种条数 S×D		0.654	0.121	0.185	1.447	1.493	0.198	0.161

每穴播种粒数 Number of seeds per hole	播种条数 Number of sowing rows	第2叶位分蘖发生比例 Percentage of tillers at the 2nd leaf position (%)	第3叶位分蘖发生比例 Percentage of tillers at the 3rd leaf position (%)	单株分蘖力 Tillering capacity per plant	成穗率 Productive tiller rate (%)
S₁	D₁	59.61±1.34 a	94.46±2.14 a	4.25±0.17 a	85.79±0.77 a
	D₂	53.55±1.93 b	93.15±2.26 a	4.14±0.14 ab	85.31±0.41 a
	D₃	47.09±1.72 c	92.52±1.50 a	4.07±0.12 b	85.23±0.76 a
S₂	D₁	38.07±2.84 a	89.92±2.09 a	3.19±0.08 a	80.00±0.14 a
	D₂	32.68±1.38 b	87.22±1.80 a	3.06±0.05 ab	79.91±0.44 a
	D₃	28.45±1.75 c	82.94±1.59 b	2.97±0.06 b	79.64±0.60 a
S₃	D₁	20.74±1.93 a	72.48±2.50 a	2.58±0.03 a	69.99±0.53 a
	D₂	14.41±3.00 b	67.92±2.49 b	2.50±0.05 ab	69.44±0.76 a
	D₃	4.91±3.04 c	59.00±2.99 c	2.38±0.07 b	68.99±0.32 a
每穴播种粒数(S) Number of seeds per hole		428.964^**	66.119^**	8174.564^**	1853.467^**
播种条数(D) Number of sowing rows		42.870^**	4.781	116.719^**	2.922
每穴粒数×播种条数S×D		1.741	5.528^**	0.082	0.313