Abstract
A field experiment was conducted to study the effect of different application timings of P in
combination with Zn and P alone on rice at Adaptive Research Farm, Gujranwala, Pakistan during the
year 2010. The experimental treatments include: P application at the time of last puddling, P
application just before transplanting, P application 10 days after transplanting, P application 20 days
after transplanting, P + Zn application at the time of last puddling, P + Zn application just before
transplanting, P + Zn application 10 days after transplanting and P + Zn application 20 days after
transplanting. Different application timings of P in combination with Zn significantly reduced the
sterile percentage, when application delayed which resulted in more normal kernels as compared to
application of P alone and late one. Maximum abortive and opaque kernels were observed when P
application was done just before transplanting. Maximum chalky kernels were perceived when P+Zn
were applied 10 days after transplanting.Regarding concentration of P and Zn in rice straw and grain
significant difference was observed in all treatments. The highest Zn concentration in grain and straw
was observed in P + Zn application at 20 days after transplanting, while minimum Zn concentration
was observed in all treatments where P alone was applied in different timings. P concentration in
grain and straw was observed near seedling transplanting time more as compared to late applications
of P alone and in combination with Zn. It is concluded that Zn is essential nutrient for anaerobic rice.
More ever best timing for P application in rice crop is at time of last puddling. Combine application of
Zn and P in rice crop at the time of last puddling, resulted in higher yield.
Faisal Nadeem, Riaz Ahmad, Muhammad Ishaq Asif Rehmani, Anser Ali, Muhammad Ahmad , Javaid Iqbal. (2013) QUALITATIVE AND CHEMICAL ANALYSIS OF RICE KERNEL TO TIME OF APPLICATION OF PHOSPHORUS IN COMBINATION WITH ZINC UNDER ANAEROBIC CONDITIONS, Asian Journal of Agriculture and Biology, Volume 1, Issue 2.
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