Effect of Calcium on Nitrogen Utilization by Rice in Saline Soils

Calcium Effect on Nitrogen Utilization by Rice

Authors

  • Armghan Shahzad PBP, Institute of Agricultural Biotech. and Genetic Resources, National Agricultural Research Centre, Islamabad-45500, Pakistan
  • Imdad Ali Mahmood Land Resources Research Programme, Institute of Natural Resources and Environmental Sciences, National Agricultural Research Centre, Islamabad-45500, Pakistan
  • Muhammad Salim Land Resources Research Programme, Institute of Natural Resources and Environmental Sciences, National Agricultural Research Centre, Islamabad-45500, Pakistan
  • Arshad Ali Land Resources Research Programme, Institute of Natural Resources and Environmental Sciences, National Agricultural Research Centre, Islamabad-45500, Pakistan
  • Badr-uz- Zaman Land Resources Research Programme, Institute of Natural Resources and Environmental Sciences, National Agricultural Research Centre, Islamabad-45500, Pakistan
  • Adil Mir Land Resources Research Programme, Institute of Natural Resources and Environmental Sciences, National Agricultural Research Centre, Islamabad-45500, Pakistan

Keywords:

soil salinity; rice; seedling soaking; N efficiency; CaSO application

Abstract

In the study of the effect of CaSO4 application and soaking of rice seedlings in 2% CaSO4 on N use effi- ciency of rice (var. Shaheen) in 3 sample soils (ECe=0.4, 4.8 and 8.7 dS/m, SAR=1.05, 14.86 and 21.43, pH=7.7, 8.3 and 9.20, respectively), a considerable reduction was observed in tillering (about 26% and 46%), plant height (about 20% and 46%) and yield (about 33% and 53%) of paddy grown in the saline soil (ECe=4.8 and 8.7 dS/m, respectively), as compared to the non-saline soil (ECe=0.4 dS/m), while soaking of seedlings in CaSO4 and N application with or without CaSO nutrition, significantly improved plant growth and paddy yield in all types of soil; overall, 26% increase in plant growth and 48% gain in paddy yield over the control was observed due to N and CaSO application, respec- tively, with soaking of seedlings in high salinity soil. Interestingly, seedlings soaked in 2% CaSO and with N applica- tion but with or without Ca supplementation performed statistically equal. Tissue Na+ significantly decreased, while K+ and Ca+2 concentrations were high due to N application along with Ca nutrition and soaking of seedlings in all types of soil. Maximum N uptake and apparent N recovery were detected in treatments, where N was applied supplemented with CaSO .

 

Author Biography

Armghan Shahzad, PBP, Institute of Agricultural Biotech. and Genetic Resources, National Agricultural Research Centre, Islamabad-45500, Pakistan

 

 

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Published

2010-04-26

How to Cite

Shahzad, A., Mahmood, I. A., Salim, M., Ali, A., Zaman, B.- uz-., & Mir, A. (2010). Effect of Calcium on Nitrogen Utilization by Rice in Saline Soils: Calcium Effect on Nitrogen Utilization by Rice. Biological Sciences - PJSIR, 53(3), 164–168. Retrieved from https://v2.pjsir.org/index.php/biological-sciences/article/view/445

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