Effects of Transgenic Cotton-Based Cropping Systems and Their Fertility Levels on Succeeding Wheat Crop
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Title |
Effects of Transgenic Cotton-Based Cropping Systems and Their Fertility Levels on Succeeding Wheat Crop
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Creator |
RAMAN JEET SINGH
I. P. S. AHLAWAT |
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Subject |
Apparent balance, Bt cotton, FYM, groundnut, nitrogen, organic carbon,wheat
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Description |
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Cotton–wheat is the second most important cropping system after rice–wheat in Indiaand Pakistan, and is practiced on about 4.02 mha. By 2010, more than 6 million Indian farmers had adopted transgenic Bt cotton on 9.4 mha—almost 90% of thecountry’s total cotton area. There is a paucity of information on the effects of intercroppingand integrated nitrogen (N)–management practices in transgenic Bt cottonon productivity, nutrient availability, and soil biological properties in the succeedingwheat crop in a cotton–wheat system. A study was made to evaluate and quantifythe residual effect of two-tiered intercropping of cotton and groundnut with substitutionof 25–50% recommended dose of nitrogen (RDN) of cotton by farmyard manure(FYM) on productivity and soil fertility in a cotton–wheat system at New Delhi during2006–2008. Wheat following groundnut-intercropped cotton receiving 50% RDNsubstitution through FYM had significantly 5% greater grain yield than that after sole cotton. Residual soil fertility in terms of organic carbon (C), potassium permanganate(KMnO4)-N, and dehydrogenase activity (14%) showed an improvement under cotton+groundnut–wheat system with substitution of 50% RDN of cotton by FYM. Apparent Nbalance as well as actual change in KMnO4-N at wheat harvest was negative in most ofthe treatments, with greater loss (–58.1) noticed under pure stand of the cotton–wheatsystem with 100% RDN of cotton through urea. The study suggested that inclusionof legume and organic manure in transgenic Bt-cotton–wheat system is a sustainablepractice for combating escalating prices of N fertilizers with environmental issues and instability of transgenic hybrids in south Asian countries. Not Available |
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Date |
2020-05-06T06:10:10Z
2020-05-06T06:10:10Z 2014-01-01 |
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Type |
Research Paper
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Identifier |
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Not Available http://krishi.icar.gov.in/jspui/handle/123456789/35421 |
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Language |
English
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Relation |
Not Available;
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Publisher |
Not Available
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