摘要
本文根据连续4年的试验结果表明,钾肥施用量与土壤中碱解氮和速效磷呈极显著负相关,与速效钾呈极显著正相关。钾肥用量与水稻植株体内全氮呈极显著负相关,与全磷关系不显著,与全钾呈极显著正相关。最高产量的钾肥用量为98.1kg/hm2,最佳经济用量89.0kg/hm2,增产率8.3%～12.3%。
According to experimental results for four years,this paper indicate that potassium fertilizer application rate was negatively corelated with soil alkalization nitrogenous and available Phosporus ,but positively corelated with soil available K (potassium).Potassium fertilizer application rate was negatively corelated with nitrogen in plant , positively corelated with potassium in plant.The maximum potassium application rate was 98.1 kg/hm2 .The optimum K application rate was 89.6 kg/hm2,increase yields rates was 8.3%～12.3%.
出处
《土壤肥料》
CAS
CSCD
北大核心
2003年第2期21-23,32,共4页
Soils and Fertilizers
关键词
水稻
钾肥
施用量
土壤肥力
植株养分
产量
Rice
potassium application rate
Soil fertility
Plant nutrient
