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Dry Matter, Nitrogen, Phosphorous, and Potassium Partitioning, Accumulation, and Use Efficiency in Transgenic Cotton-Based Cropping Systems

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Title Dry Matter, Nitrogen, Phosphorous, and Potassium Partitioning, Accumulation, and Use Efficiency in Transgenic Cotton-Based Cropping Systems
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Creator RAMAN JEET SINGH
I. P. S. AHLAWAT
 
Subject Apparent balance, dry matter, FYM, groundnut, nitrogen, organic carbon, transgenic cotton
 
Description Not Available
A better understanding of the fate of nutrients in transgenic cotton (Gossypiumhirsutum
L.) fields will improve nutrient efficiencies, will optimize crop growth and
development, and may help to enhance soil quality. A study was made to evaluate and
quantify the effect of cropping system [sole cotton and groundnut (Arachishypogaea)
intercropping with transgenic cotton] and nitrogen (N) management [control (0N),
100% recommended dose of nitrogen (RDN) through urea, substitution of 25% RDN
through farmyard manure (FYM), and substitution of 50% RDN through FYM] on
dry matter (DM) and nutrient partitioning and accumulation by transgenic cotton and
groundnut at New Delhi during 2006–2007. Soil and plant samples were collected and
analyzed at 60, 90, and 120 days after sowing and at harvest. Results revealed that
intercropping of groundnut with cotton did not significantly affect DM and nutrient
partitioning in cotton, but residual soil fertility in terms of potassium permanganate
(KMnO4) N showed an improvement in contrast to Olsen’s P and ammonium acetate
(NH4OAc)–exchangeable K over sole cotton. At harvest, of total DMassimilated, leaves
constituted 10–20%, stem 50%, and reproductive parts of cotton accounted for the rest.
For each kilogram of seed cotton produced, the crop assimilated 61 g of N, of which 23 g
was partitioned to harvested seed cotton. Substitution of 25% RDN through FYM, being
on par with 100% RDN through urea, recorded greater DM, nutrient uptake in different
parts of cotton, agronomic N-use efficiency (9.5 kg seed cotton kg N–1), and apparent
N recovery (83.3%) over 50% RDN substitution through FYM and control. The control,
being on par with 50% RDN substitution through FYM, recorded significantly
greater DM and nutrient uptake by intercropped groundnut over other treatments.
Apparent N and potassium (K) balance at the end of study was negative in all treatments;
however, the actual change in KMnO4 N was positive in all the treatments
except control. Our study suggests that intercropping of groundnut with transgenic
cotton and substitution of 25% dose of N through FYM is sustainable in tropical
countries.
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Date 2020-03-05T08:41:33Z
2020-03-05T08:41:33Z
2012-03-14
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/33588
 
Language English
 
Relation Not Available;
 
Publisher Not Available