摘要
在大田条件下研究了鄂东地区水旱轮作三熟制中晚稻生长和产量对氮、磷、钾肥的反应。其中钾肥增产效果最好,最高达43.3%,氮肥最高为25.9%,而磷肥的最高增产率仅2.6%。结果还显示,一种养分增产效果的发挥受其他养分供应水平的影响,只有在其他养分供应充足时才能发挥氮、磷或钾的增产作用。根据肥料效应方程,每公顷最高产量的N、P2O5和K2O用量分别为161kg、21.5kg和451kg。
A field trial was carried out to study nitrogen（N）,phosphate（P）and potassium（K）fertilization on late-season rice under rapeseed-rice-rice rotation in the East Hubei Province. K got the highest effect on rice yield with increment of 43.3 percent at 225 kg K2O per heetare compared to no K treatment. The highest increment of N was 25.9 percent with 165 kg N application per hectare. And the highest increment of P was only 2.6 percent. According to fertilizer response equation, the highest yield will be reached when N, P2O5 and K2O application rate was 161 kg, 21.5 kg and 451 kg per hectare, respectively.
出处
《湖北农业科学》
北大核心
2006年第2期174-176,共3页
Hubei Agricultural Sciences
基金
国家自然科学基金项目(40571090)
关键词
晚稻
氮肥
磷肥
钾肥
平衡施肥
late-season rice, nitrogen（N） ： phosphate（P）
potassium（K）
balanced fertilization
