论文部分内容阅读
[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 a theoretical basis for rational fertilization of middle-season hybrid rice. [Method] The field experiment was conducted to study the effects of potash fertilizer application on the yield and K accumulation and utilization of middle - indica rice. [Result] Applying potassium could significantly increase the yield of rice. Under the application of 120 kg / hm2 of potassium, there was no significant difference in the yield of potash or basal application of potash at 150 kg / hm2 potassium application. Potassium fertilization could significantly increase the yield of rice at 150 kg / 9.56%. Potassium fertilizer topdressing significantly increased the amount and proportion of potassium uptake from jointing to heading than that of one-time basal application, and increased seed number, seed setting rate and yield, and significantly increased potassium utilization efficiency. [Conclusion] The application of K fertilizer to mid-season hybrid rice should have a good effect when using low-level K fertilizer as basal fertilizer, and high K-fertilizer application with obvious yield increase effect.