摘要
大田试验结果表明 :湖北省油菜主产区油菜田土壤速效钾缺乏临界值为 70～ 80mg/kg ,当速效钾 >10 0mg/kg时可以不施钾肥。从维持地力和保证高产稳产的角度出发 ,油菜推荐施钾量为每公顷 12 0～ 2 4 0kgK2 O ,具体用量可根据方程 ^y =4 3 2 - 4 3 2x来确定 (y为K2 O施用量 ,x为土壤速效钾测定值 )。
The relationship between soil available potassium (K) and effect of K application on rapeseed was studied with field experiments The results showed that,the deficiency criteria of available K for rapeseed in Hubei Province is about 70-80 mgK/kg,and as soil available K is over 100 mg K/kg,it is unnecessary to use K fertilizer For rapeseed,the recommended rate is 120-240 kg K 2O hm 2 Exact recommended amount could be achieved by the equation,y=423-4 32x(y:applied rate of K 2O;x:soil available K content)
出处
《湖北农业科学》
北大核心
2001年第5期46-48,共3页
Hubei Agricultural Sciences
基金
加拿大钾磷肥研究所 (PPI/PPIC)资助项目
关键词
油菜
土壤速效钾
钾肥
施肥量
rapeseed,soil available potassium,potassium recommendation
