The server is under maintenance between 08:00 to 12:00 (GMT+08:00), and please visit later.
We apologize for any inconvenience caused
Login  | Sign Up  |  Oriprobe Inc. Feed
China/Asia On Demand
Journal Articles
Laws/Policies/Regulations
Companies/Products
Bookmark and Share
shi hui xing tu rang zhong lin fei hou xiao ji lin su zhuan hua gui lv de yan jiu
Author(s): 
Pages: 147-152
Year: Issue:  S1
Journal: Acta Agriculturae Boreali-Sinica

Keyword:  石灰性土壤磷肥后效磷素形态转化施肥;
Abstract: 对河北省低磷石灰性土壤磷肥后效以及试验周期中水溶性磷肥的固定转化规律及其有效性进行了研究,并对磷肥不同分配方式的经济效果做了评价.结果表明,磷肥后效明显,且随施磷量增加后效期延长.一次亩施16公斤P2O5,至少可维持四年的后效作用.磷肥施入土壤后,以速效态存在者约20%,约80%转化为难溶性磷酸盐.以后难溶性磷酸盐仍会被释放出来为作物吸收.四年中Al-P进一步向Ca-P转化,说明Al-P可视为活性较强的一种过渡形态.而且Al-P与速效磷含量之间呈高度显著正相关,Al-P每增加10ppm,速效磷约增加3ppm.每年亩施4公斤P2O5效果最好,隔年施8公斤和四年一次施16公斤其效果约为每年分施的70~90%.
Related Articles
No related articles found