Dr.renu Dhupper

Phosphorus and potassium availability and uptake in rice and wheat crop under conventional and conservation agriculture practices

  • Authors Details :  
  • Rashmi Mittal,  
  • Bidisha Chakarvorty,  
  • Usha Meena,  
  • Renu Dhupper,  
  • Manju Rawat

Journal title : Science

Publisher : American Association for the Advancement of Science (AAAS)

Online ISSN : 1095-9203

Page Number : 393-393

Journal volume : 304

Journal issue : 5669

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Conservation agricultural (CA) practices prove to be beneficial in terms of resource utilization and maintenance of soil health. Rice-Wheat cropping system (RWCS) is the majorcropping system in Indo-Gangetic plains of India. CA practices are becoming popular in this cropping system as sustainable agricultural management practices. Phosphorus (P) and potassium (K) are important primary nutrients and are required for crop growth. A field experiment was conducted during the period of 2015-2017 at Taraori village of Karnal district in Haryanato study the effects of conservation agricultural practices on P and K availability as well as uptake in rice-wheat cropping system. The experiment comprised of four treatments i.e. Transplanted rice + Conventionally tilled wheat (T1), Direct seeded rice + Zero tilled wheat with residue retention (T2), Transplanted rice + Zero tilled wheat (T3) and Transplanted rice + Zero tilled wheat with residue retention (T4). Results showed that P uptake was highest in T4 treatment in wheat crop. P uptake in rice was highest in T4 treatment while direct seeded rice (T2) showed lowest P uptake. CA practices also increased K uptake in both the crops. Practicing zero tillage in wheat increased the availability of soil phosphorus as compared to conventionally tilled treatment with highest value (34 kg ha-1) recorded in T3 treatment. But direct seeded rice soil showed lower values of soil available P. Similar to phosphorus, available potassium of soil also increased in all treatments. Highestvalue (341.5 kg ha-1) of available K was recorded in T4 treatment while it was minimum (307.2 kg ha-1) in T1. Residue incorporation in soil led to more availabilityof K in T2 and T4 treatment. This study features the significance of conservation agricultural practices over conventional practices in terms of increasing the uptake and availability phosphorus and potassium in soil. Key words : Conservation agriculture,

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DOI : https://doi.org/10.1126/science.1093079

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