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PHOSPHORUS AND RAIN-HARVESTED WATER ECONOMY TTHROUGH VESICULAR ARBUSCULAR MYCORRHIZAE (VAM) IN OKRA-PEA SEQUENCE

KrishiKosh

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Title PHOSPHORUS AND RAIN-HARVESTED WATER ECONOMY TTHROUGH VESICULAR ARBUSCULAR MYCORRHIZAE (VAM) IN OKRA-PEA SEQUENCE
 
Creator Kumar, Anil
 
Contributor Suri, V.K.
 
Subject ##Unable to generate tags ivj_v90_i12_pg086-086.pdf
Soil Science
##Unable to generate tags ivj_v90_i12_pg086-086.pdf
Okra Pea
 
Description Doctoral Dissertation
The present study was carried out during 2009-11 with the aim of economizing phosphorus and rain-harvested water through vesicular arbuscular mycorrhizal (VAM) fungi in okra-pea sequence. Use of VAM is highly desirable today from the perspective of meeting nutrient needs of crops efficiently and economically, rationalizing water use and maintaining soil health. Above work consisted of 14 treatments viz. 2 VAM levels (0 & 12 kg ha-1), 3 phosphorus levels (50, 75 & 100% of soil test based recommended dose) and 2 irrigation regimes (40 & 80% of available soil water holding capacity) and 2 controls (farmers‟ nutrient practice and generalized recommended dose (NPK). Above treatments were laid out in a completely randomized block design (RBD) with 3 replications. The data on yield attributes, yields, nutrient uptake, net returns and B:C ratios in okra-pea sequence indicated that treatment ―VAM + 75 per cent soil test based recommended P dose at either of 2 irrigation regimes‖ did not differ significantly than generalized recommended dose and ―VAM + 100 per cent soil test based recommended P dose‖. It suggests an economy of about 25 per cent in soil test based P dose through seed inoculation with mycorrhizal culture (VAM). The use of mycorrhizal biofertilizer (VAM) enhanced water use efficiency of okra and pea crop by about 5-17 and 12-35 per cent, respectively. Integrated application of VAM, P and irrigation did not alter available soil nutrient status significantly, however, available P status was enhanced by 15-20 per cent after harvest of each of the two crops i.e. okra and pea. Further, after completion of two years‟ of okra-pea sequential cropping, integrated application of VAM, P and irrigation enhanced water holding capacity and mean weight diameter of soil particles by 5-6 and 4-9 per cent, respectively. Above practice evaluated in okra-pea sequence for two years, led to higher status of water soluble-P (10-32%), NaHCO3-Pi (8-13%), NaOH-Pi (5-13%) and low status of organic-P (NaHCO3-Po & NaOH-Po), each one of which contributed appreciably to available P supply to plants. Results of the current study suggest that the practice of VAM inoculation can go a long way in reducing the cost of production directly as well as otherwise. Moreover, its continuous use is going to enhance crop quality and overall soil fertility, which is the need of the hour.
 
Date 2016-08-08T11:48:04Z
2016-08-08T11:48:04Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/71465
 
Language en
 
Format application/pdf
 
Publisher CSK Himachal Pradesh Krishi Vishavavidyalaya, Palampur