Nitrogen and rice straw incorporation impact Zn fractions and wheat yield in rice-wheat system

A long-term experiment was conducted at research farm of department of Soil Science, PAU to investigate the impact of rice straw incorporation (0-10 t/ha/yr) and fertilizer N (0-150 kg N/ha) application on wheat yield and Zn fractions after 7 years (2010–17). The treatments were arranged in a split plot design with three replications, N (N0, N90, N120 and N150) in main plots and rice straw (RS0, RS5, RS7. 5 and RS10) in sub-plots. Zinc fractions were significantly increased with graded levels of RS incorporation. The greater part of total-Zn was present in residual form and only a minute part was present in readily available forms, i.e. WS+EX form. Regardless of the treatments, relative preponderance of these Zn fractions was: WS+EX Zn

Keywords:

• rice wheat
• Zinc
• correlation analysis
• Fertilizer
• rice straw
• Soil carbon
• Chemistry
• Animal science
• Yield (chemistry)
• Nitrogen

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