Vol. 7, Issue 2 (2019)
Effect of customized leaf colour chart and different doses of Neem coated urea on the nitrogen use efficiency and yield of rice
Author(s): Ipsita Pattanaik, VN Mishra and AK Nayak
Abstract: Need based application of neem coated urea can enhance the nitrogen use efficiency as neem (Azadirachta indica) has nitrification inhibiting properties. A field study was performedat institute research farm of ICAR-NRRI Cuttack (Odisha) during the Kharif season, 2017 to evaluate the effect of customized leaf colour chart and different doses of neem coated urea on the nitrogen use efficiency and yield of rice. Along with a no-N control, NCU tried at three N levels-50, 75 and 100% of the recommended level of 80 kg N ha -1. Different doses of N were applied based on conventional approach in three split doses i.e. 50% at transplanting and 25% both at maximum tillering and panicle initiation stage in three treatments and for need based site speciï¬c N management (SSNM) and to improve N use efficiency, different doses of NCU was applied in three treatments using customized leaf colour chart (CLCC) in three equal splits i.e. 33% at transplanting and whenever N was deficient according to CLCC observations. In one treatment ordinary urea was applied at 100% of its recommended dose in conventional approach. Naveen variety of rice as test crop was transplanted on 5th August 2017 and harvested on 13thNovember 2017. From all the analysis it was found that application of NCU based on CLCC recorded higher yield i.e. by 7.74% as compared to NCU applied conventionally and 75% recommended dose of nitrogen in form of NCU based on CLCC recorded the highest N recovery efficiency (RE N) (49.62%). Based on this results it can be stated that 25% N can be saved in comparison to 100 % of its recommended dose.
Pages: 311-312 | 446 Views 73 Downloads
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How to cite this article:
Ipsita Pattanaik, VN Mishra, AK Nayak. Effect of customized leaf colour chart and different doses of Neem coated urea on the nitrogen use efficiency and yield of rice. Int J Chem Stud 2019;7(2):311-312.
