Abstract
The availability of soluble P fertilizers at affordable prices has become a myth in Pakistan. One alternative under consideration is the use of locally available rock phosphate (RP) which requires dissolution of P from apatite before its use. The main aim of this study was to assess the availability of P from RP amended with farm manure (FM). Locally available rock phosphate and single superphosphate (SSP) as P2O5 were applied at 0+100, 25+75, 50+50, 75+25 and 100+0 %, respectively, with and without farm manure (10 tons ha-1) in addition to the treatment receiving recommended rate of N and K at 150 and 60 kg ha-1 in the form of urea and sulphate of potash, respectively. Farm manure application had a significant positive effect on plant growth, yield, P in leaf tissue and uptake of maize in all the treatments. The treatment receiving 25+75% RP and SSP along with 10 tons ha-1 FM produced maximum shoot dry matter yield (30 g pot-1), P content (0.31%) and uptake (0.10 g pot-1) followed by treatment having 50+50 RP and SSP . It may be concluded that RP integrated with SSP and FM increased maize growth, dry matter, leaf P content and uptake so, it can be adapted as an alternative strategy to get improved yield of maize in resource poor country like Pakistan
Noor Muhammad Mashori, Mehrunisa Memon, Kazi Suleman Memon , Hidayatullah Kakar. (2013) Maize dry matter yield and P uptake as influenced by rock phosphate and single super phosphate treated with farm manure, The Journal Soil & Environment , Volume 32, Issue 2.
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