摘要
采用多元二次旋转回归正交组合设计试验,研究3个施期(基肥和蘖肥、穗肥、粒肥)的氮肥用量、调节肥施用时间及穴距等5个因素对粳稻垦鉴稻10号源库关系的影响。结果表明,基肥和蘖肥用氮量与最大叶面积指数及单位面积结实颖花数呈显著正相关;调节肥施用时间与单位面积结实颖花数呈负相关;穴距与最大叶面积指数及单位面积结实颖花数呈极显著二次曲线关系。说明通过适当加大前期用氮量或协调前期用氮量与种植密度等栽培措施的互作,可在适当范围内(即基、蘖肥用氮量达到140 kg/hm2,穗肥,粒肥用氮量为0 kg/hm2,调节肥施用时期6.7叶,穴距12 cm)提高群体结实颖花数并最终提高产量。
To investigate the effects of dosage of nitrogen （N） fertilizer at early stage （ES）, middle stage （MS） and late stage （LS）, of application time of the regulating fertilizer （RF） and of row space （RS） on the source-sink relationship of the conventional japonica rice variety Kengjiandao10, the field experiment with multiple factors quadratic rotational-regressive-orthogonal combination design was conducted in cold area of China. The results showed that the amount of N-fertilizer applied at early stage had significant positive correlation with the maximum leaf area index （LAImax） and with the spikelets per unit area; the application time of RF had negative correlation with fertile glume numbers per unit area; and the RS had a quadratic curve relationship with LAlmax and with the fertile glume numbers per unit area. It can be concluded that fertile glume numbers could be improved by increasing the amount of N-fertilizer at early stage or by interaction between N-fertilizer application and other cultivation measures （N-fertilizer amount at ES being 140 kg/hm^2, N-fertilizer amount at MS and LS being 0 kg/hm^2, RF being applied at 6.7 leaf stage, RS being 12 cm）, thus improve the rice yield.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第1期17-22,共6页
Journal of Hunan Agricultural University(Natural Sciences)
基金
黑龙江省科学技术厅项目(GA10B102)
黑龙江省农垦总局科技局项目(HNK11A–02–02
HNK11A–01–01–02)
关键词
寒地水稻垦鉴稻10号
源库关系
叶面积指数
实颖花数
rice cultivar Kenjiandao 10 for cold area
source-sink relationship
leaf area index
fertile glume numbers
