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Volume 1, Issue 2      April-June, 2013

Qualitative and chemical analysis of rice kernel to time of application of Phosphorus in combination with Zinc under anaerobic conditions
 

Faisal Nadeem1, Riaz Ahmad1, Muhammad Ishaq Asif Rehmani2, Anser Ali2, Muhammad Ahmad 3* and Javaid Iqbal4

1 Department of Agronomy, University of Agriculture, Faisalabad, Pakistan

2Department of Agronomy, College of Agriculture, Dera Ghazi Khan, Pakistan

3Agriculture Adaptive Research Complex, Dera Ghazi Khan, Pakistan

4 Adaptive Research Farm, Gujranwala, Pakistan

*Corresponding author: e-mail: mahmada2003@yahoo.co.uk

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.

 

Keywords: Rice, Time of application, Zn, P, Yield and Qualitative Characteristics

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