摘要
[目的]为杂交中稻的合理施肥提供理论依据。[方法]通过田间试验,研究钾肥运筹对中籼稻产量和钾素积累利用的影响。[结果]施钾可以显著提高水稻产量。在120 kg/hm2施钾量下,钾肥一次性基施或钾肥后移产量差异不明显;而在150 kg/hm2施钾量下,钾肥后移能显著提高水稻产量,比全作基肥处理增产9.56%。钾肥的穗肥追施比一次性基施明显增加拔节至抽穗的吸钾量和比例,提高实粒数、结实率和产量,并显著提高钾素利用效率。[结论]杂交中稻施用钾肥应掌握施中低量钾肥时作基肥的效果较好,而高量钾肥分次施用有明显的增产效果。
[Objective]The research aimed to provide the theoretical basis for the rational application of fertilization to indica rice.[Method]Field trial was conducted to study the effects of potassium management on indica rice yield and the accumulation and utilization of potassium.[Result]The application of potassium could increase the rice yield significantly.The effects of one-time basal application and potassium retrusion with the amount of 120 kg/hm2 potassium on the yield weren＇t obvious.The rice yield was increased by 9.56% with 150 kg/hm2 potassium retrusion compared with that of one-time basal application.K uptake and the ratio were increased in jointing-heading stage,the number of grains per panicle,ripening rate and the yield were increased,and the potassium utilization efficiency increased obviously.[Conclusion] The effect of middle or low amount potassium as basal fertilizer was better.And under the high amount potassium fertilizer,the effects of split application on the yield were obvious.
出处
《安徽农业科学》
CAS
2012年第31期15207-15209,共3页
Journal of Anhui Agricultural Sciences
基金
国家科技支撑计划课题(2011BAD16B06)
关键词
杂交中籼稻
钾肥运筹
吸收效应
Indica hybrid rice
Potassium management
Absorption effect
