Phosphorus availability to maize as influenced by organic manures and fertilizer P associated phosphatase activity in soils
Phosphorus availability to maize as influenced by organic manures and fertilizer P associated phosphatase activity in soils
复制标题
DOI：
10.1016/j.biortech.2007.10.063
复制
发表时间：
2008-09-01
影响因子：
11.4
通讯作者：
Bahl, G. S.
中科院分区：
文献类型：
--
作者：
Garg, Shipra;Bahl, G. S.
通过室内培养和绿色温室试验，比较了不同有机肥对玉米磷的有效性和玉米对有机肥磷的吸收。在Samana桑迪壤土和Ladhowal粉壤土上施用不同有机肥，即鸡粪（PM）、农家肥（FYM）、绿色肥（GM）和农作物残体（CR）以及不同水平的磷肥，培养7、15、30、60和90 d。分析了样品的磷有效性，磷吸收和碱性磷酸酶活性。Ladhowal粉壤土中的磷酸酶总活性、对帕拉基磷酸（PNP h（-1）g（-1））高于Samana桑迪壤土。随着无机磷水平的提高，土壤中PNP的释放量也随之增加。在不同有机肥中，有机肥的酶活性最高，其次是有机肥、GM和CR。与7天孵育相比，在两种土壤中孵育90天的样品中观察到PNP略有增加。有机肥中磷酸酶活性的差异进一步反映在磷的动态有效性上。最高量的Olsen提取的P是在PM处理的土壤，其次是FYM，GM和田间豌豆作物残留。有机肥添加沿着与无机磷，无论来源，增加了奥尔森可提取的P在整个孵化期。玉米对磷的吸收总量随土壤无机磷水平的增加而增加。最高的吸收，获得在PM处理的土壤和最低的CR修正的土壤。我们的结论是PM更容易供应P植物比其他有机肥料来源。(C)2008年由Elsevier Ltd.出版
Laboratory incubation and green house studies were conducted to compare the P availability of organic manures and P uptake from organic manures by maize. Various organic manures viz. Poultry manure (PM), Farmyard manure (FYM), Green manure (GM) and Crop residue (CR) and graded levels of fertilizer P were applied in Samana sandy loam and Ladhowal silt loam soils and incubated for 7, 15, 30, 60 and 90 days. Samples were analyzed for P availability, P uptake and alkaline phosphatase activity. The overall, phosphatase activity, Para nitroph enyl phosphate (PNP h(-1) g(-1)), in the Ladhowal silt loam soil was higher than in the Samana sandy loam soil. As the level of inorganic P increased, the release of PNP h(-1) g(-1) soil also increased. Among different organic manures, PM registered the highest enzyme activity followed by FYM, GM and CR. Compared to 7 days incubation a slightly higher increase in PNP was noticed in samples from 90 days incubation in both soils. The differential phosphatase activity in the organic manures was further reflected in dynamic P availability. The highest amount of Olsen extractable P was in PM-treated soil followed by FYM, GM and field pea crop residue. Organic manure addition along with inorganic P, irrespective of the source, increased the Olsen extractable P throughout the incubation period. Total P uptake by maize increased with the increasing level of inorganic P in both soils. The highest uptake was obtained in PM-treated soil and lowest in the CR-amended soil. We conclude that PM more readily supplies P to plants than other organic manure sources. (C) 2008 Published by Elsevier Ltd.