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Integrated nitrogen management in Cabbage (Brassica oleracea var. capitata) and establish its critical limit in soil and plant under temperate conditions

KrishiKosh

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Title Integrated nitrogen management in Cabbage (Brassica oleracea var. capitata) and establish its critical limit in soil and plant under temperate conditions
 
Creator Talat Majid
 
Contributor Tahir Ali
 
Subject Cabbage, INM, Soil properties, pot culture, yield, quality
Soil Science
 
Description PhD Thesis submitted to SKUAST Kashmir
There is a concern that use of inorganic fertilizers alone cannot sustain high levels of productivity and cause deterioration of the soil health and environment. The use of farmyard manure, vermicompost and microbial inoculants (Azospirillum) to improve plant nutrition may address these issues. Effects of vermicompost or farmyard manure and microbial inoculants in combination with inorganic fertilizers on growth, yield and soil health need to be better understood. In this regard, a field experiment with twenty four (24) treatment combinations with inorganic fertilizers, organic manures and microbial inoculants (Azospirillum) was carried out for two consecutive years during Kharif 2010 and 2011 at Vegetable Experimental Farm of Division of Vegetable Science, SKUAST-Kashmir, Shalimar to study the effect of “Integrated nitrogen management in Cabbage (Brassica oleracea var. capitata) and establish its critical limit in soil and plant under temperate conditions”. The experiment was carried out in split plot design with three levels of organic manures (farmyard manure @ 10 t ha-1, vermicompost @ 5 t ha-1 and control), and two levels of biofertilizers (un-inoculated, inoculated with Azospirillum) as sub plot treatments and four levels of nitrogen (0, 100, 150, 200 kg ha-1) as main plot treatments. The results revealed that the yield and yield attributing characters viz., Head weight, Head diameter, Core length and Number of non-wrapper leaves showed significant increase with the increasing levels of nitrogen in combination with organic fertilizers. Among organics vermicompost @ 5 t ha-1 was found superior over others. For quality parameters viz., Crude protein, Vitamin A, Vitamin C, Reducing sugars, TSS and Chlorophyll also significantly increased with the application of nitrogen levels. Inoculation of Azospirillum showed significant results over control. The plant analysis showed significant increase in nutrient content and their uptake with increasing nitrogen levels. Among organics vermicompost (5 t ha-1) showed significant results over farmyard manure (10 t ha-1) in maintaining major nutrient concentration and their uptake. Inoculation of Azospirillum also showed significant increase over control. Plant analysis also showed that increased nitrogen levels in combination with organic manures and microbial inoculants yielded significant higher concentration of nutrients and their uptake. The effect of different nitrogen levels in conjunction with organic manure and Azospirillum increased all fractions of nitrogen (NH4+, NO3- and total N) and available N, P and K content of the soil after harvest of the crop. The secondary and micronutrients of post harvest soil were also increased with application of increasing levels of nitrogen in integration with organic manures and microbial inoculants. Soil physico-chemical properties were also improved by the application of inorganic fertilizers in combination with organic manures. For pot culture experiment twelve representing soil samples from District Budgam were collected and subjected to different studies viz., physico-chemical characteristics and different forms of nitrogen and establishment of critical limit of nitrogen in soil and plant. On an average available nitrogen, ammonical nitrogen, nitrate nitrogen and total nitrogen varies from 230.20-314.40, 95.72-129.84, 125.41-173.85 and 581-635 ppm, respectively. Among different extractants alkaline potassium permanganate method showed significant positive correlation with nitrogen uptake and dry matter yield and proved to be the best indicator of nitrogen availability. The scatter diagram reveals that critical limit of soil nitrogen below which an economic response of cabbage to applied nitrogen can be expected was 220 ppm. Critical limit of nitrogen concentration in cabbage (cv. Rare ball hybrid) was worked out to be 0.51 per cent.
Key words: Cabbage, INM, Soil properies, pot culture, yield, qualityt
SKUAST Kashmir
 
Date 2016-12-21T13:18:09Z
2016-12-21T13:18:09Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/91794
 
Language en
 
Format application/pdf