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Pakistan Journal of Biological Sciences
  Year: 2007 | Volume: 10 | Issue: 21 | Page No.: 3865-3869
DOI: 10.3923/pjbs.2007.3865.3869
 
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Effect of Variable Rates of Gypsum Application on Wheat Yield Under Rice-Wheat System

Rahmat Ullah Khan , Ali Raza Gurmani , Muhammad Sohail Khan and Akber Hussain Gurmani

Abstract:
A field experiment was initiated during 2005-2006 to study the effect of gypsum application on rice and subsequent wheat crop. The direct, residual and cumulative effects of gypsum were also noticed under rice-wheat system. The gypsum was applied as 0, 1 and 2 t ha-1 with the basal dose of N, P2O5, K2O as 120, 90 and 60 kg ha-1 to both crops. Rice variety IRRI6 and wheat variety Naseer 2000 were planted in Randomized Complete Block Design with three replications in a permanent layout. The soil samples were collected from both crops before earing to study P and K concentrations. The rice yield was significantly affected by gypsum application that ranged from 4807-5472 kg ha-1. The highest rice yield was recorded by the application of 2.0 t gypsum ha-1 with an increase of 13.8% over control. Similarly all the yield components like number of panicles m-2, panicle length, plant height and 1000 grain weight were also significantly affected by gypsum application. The wheat grain yield ranged from 2598 to 4304 kg ha-1. The cumulative application of 1 and 2 t gypsum ha-1 increased the wheat yield by 25.25 and 65.66% over check, respectively. The direct and residual application of 2 t gypsum ha-1 gave an increase of 46.80 and 15.05% over the check, respectively. The application of gypsum significantly affected the P and K that ranged from 4.50-7.50 and 4.70-9.32 mg kg-1 P while 70-110 and 78-112 mg kg-1 K in rice and wheat, respectively.
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How to cite this article:

Rahmat Ullah Khan , Ali Raza Gurmani , Muhammad Sohail Khan and Akber Hussain Gurmani , 2007. Effect of Variable Rates of Gypsum Application on Wheat Yield Under Rice-Wheat System. Pakistan Journal of Biological Sciences, 10: 3865-3869.

DOI: 10.3923/pjbs.2007.3865.3869

URL: https://scialert.net/abstract/?doi=pjbs.2007.3865.3869

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