摘要
以易倒伏水稻品种垦稻12为试验材料,设置600g/hm2、900g/hm2、1 200g/hm2、1 500g/hm2 4个调节剂水平,研究不同调节剂用量对水稻抗倒伏能力及产量性状的影响。结果表明:调节剂处理水稻的株高降低,节伸长受到抑制,茎秆抗折力增加,弯曲力矩减小,倒伏指数减小。与对照相比,化学调控有效降低了水稻倒伏的发生几率。调节剂处理可促进水稻分蘖,收获穗数的增加补偿了千粒重降低的负效应,在600g/hm2处理水平下,寒地水稻收获穗数增加明显,结实率有增加趋势,水稻产量比对照增加显著。900g/hm2、1 200g/hm2处理水平下水稻产量增加不明显,在1 500g/hm2处理水平下产量比对照降低。
Effects of chemical regulation on lodging and yield at four chemical regulating levels were studied using ＂Kendao12＂ as materials.The results showed that the plant height was shortened,elongation of stem was restrained,the breaking-resistant strength of stem was increased,and bending moment and lodging index was decreased by chemical regulation.Compared with the control,chemical control effectively reduced the probability of the occurrence of rice lodging.The increase of panicle number harvested compensated negative effects of 1000-grain weight Since panicle number of rice in the cold region increased significantly.Seed setting rate had increasing tendency and rice yield increased significantly compared with the control under chemical regulation of 600g/hm2.The rice yield increased insignificantly at 900g/hm2 and 1200g/hm2 treatment level.At 1500g/hm2 treatment level,the rice yield decreased.
出处
《作物杂志》
CAS
CSCD
北大核心
2011年第6期68-72,共5页
Crops
关键词
水稻
寒地
倒伏
化学调控
产量性状
Rice
Cold region
Lodging
Chemical regulation
Yield traits
