Phenological Response of Rice Plants to Different Micronutrients Application under Water Saving Paddy Fields on Calcareous Soil

Authors : Naeem Sarwar, Hakoomat Ali, Muhammad Maqsood, Ehsan Ullah, Muhammad Shahzad, Khuram Mubeen, Ahmad Naeem Shahzad, Muhammad Asghar Shahid and Shakeel Ahmad

Pages : 52-57

View : 43 | Download : 14

Publication Date : 2013-01-01

Article Type : Research Paper

Abstract :Due to a reduction of world water resources, rice cultivation has shifted from flooded to aerobic condition. This shift may alter soil physico-chemical conditions and cause reduced availability and uptake of nutrients, especially boron and zinc in calcareous soils, and may ultimately reduce yield. Thus a field experiment in a calcareous soil was conducted in which basal application of boron & zinc alone, or in combination, was undertaken in rice grown aerobically insert ignore into journalissuearticles values(T1);, flooded for the entire growth period insert ignore into journalissuearticles values(T2); or flooded for two weeks after transplanting, given supplemental irrigation up to panicle initiation and then flooded from panicle initiation to physiological maturity insert ignore into journalissuearticles values(T3);. The study showed that rice crop was significantly reduced growth in term of Leaf Area Index insert ignore into journalissuearticles values(LAI);, Leaf Area Duration insert ignore into journalissuearticles values(LAD);, Crop Growth Rate insert ignore into journalissuearticles values(CGR);, Total Dry Matter accumulation insert ignore into journalissuearticles values(TDM); and Net Assimilation Rate insert ignore into journalissuearticles values(NAR); when it was grown in aerobic condition. However, the crop was not affected significantly different from normal flooded rice insert ignore into journalissuearticles values(T2); when it was grown in modified rice culture insert ignore into journalissuearticles values(T3);. Application of zinc alone or in combination with boron enhanced chlorophyll contents in T2similar to T3 while the crop grown in aerobic condition insert ignore into journalissuearticles values(T1); had significantly lower chlorophyll content
Keywords : Rice, growth, boron, zinc and rice cultures

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