ISSN:
1573-0867
Schlagwort(e):
Long term experiment
;
Residual P
;
applied P
;
fertilizer P uptake
;
residual P uptake
;
per cent P utilization
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
Notizen:
Abstract The effect of residual (built up in continued fertilizer experiments) and applied P in Fatehpur loamy sand and Jodhan sandy loam soils of two long term experiments on its availability and uptake by wheat (Triticum aestivum L.) was studied using32P in greenhouse experiment. Dry matter yield increased significantly with carry over P. Response in the absence of residual P was observed up to a direct application of 134 kg P ha−1, whereas, in the presence of carry over P, the response was confined upto 67 kg P ha−1 at site A. The response was however, observed up to 67 kg P ha−1 irrespective of carry over P at site B. Total P uptake by wheat was significantly increased at all levels of residual P. However, it did not differ signficantly among levels of residual P when these were high. The uptake of soil P (residual) increased signficantly with increase in the dose of directly applied P, indicating that addition of inorganic P fertilizer tends to mobilize the native soil P. Per cent utilization of fertilizer P was enhanced in soils having residual P from continuous application of both inorganic and organic P sources.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01049480
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