1Assistant Professor, All India coordinated Research Project on Soil Test and Crop Response, Directorate of Research, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal741 235
2Pro-fessor, Department of Agricultural Chemistry and Soil Science, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal741 252
3Assistant Professor, Department of Soil Science and Agricultural Chemistry, Lovely Professional University, Phagwara, Punjab144 001
Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia, West Bengal741 235
*Corresponding author's Email: mondal.sudeshna2010@gmail.com
Online published on 27 August, 2021.
A field experiment was conducted at Nadia, West Bengal, to evaluate the effect of different levels of phosphorus (P) and zinc (Zn) on the yield, soil P and Zn availability, P and Zn nutritional quality and also Zn recovery efficiency of boro rice (Oryza sativa). Combined application P and Zn enhanced increased the yield of rice, recording the highest in P80Zn10 treatment (P @ 80 kg/ha and Zn @ 10 kg/ha). Results showed significant increase in P: Zn ratio, grain phytic acid (PA) content and PA: Zn molar ratio with simultaneous decrease in Zn content and uptake by rice, Zn harvest index (Zn-HI), relative transfer of Zn from root to grain and also soil phosphatase activity (PA) in rice with P application up to the highest level (80 kg P/ha). The availability of applied Zn in soil was also reduced to some extent with higher rates of P application. However, Zn application significantly increased Zn content and uptake by rice and reduced the P: Zn ratio, grain PA content and PA: Zn ratio and ultimately enhanced the bioavailability of zinc in rice grains.
Inseptisol, Interaction, Phosphorus, Phytic acid, Rice, Zinc uptake
