Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810029254
Authors: ANITHA, M. S
Advisor: Prakash, N. B
Title: EVALUATION OF DIFFERENT DIATOMITE COMPOUNDS ON SOIL PROPERTIES, GROWTH AND YIELD OF AEROBIC RICE
Publisher: UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Language: en
Type: Thesis
Pages: 228
Agrotags: null
Abstract: An incubation, green house and field experiments were conducted to know the effect of different grades (DE-1, DE-2, DE-3, DE-4 and DE-5) and levels (250, 500, 750, 1000 and 1500 kg ha-1) of diatomite (DE) on soil properties, growth and yield of aerobic rice in acidic (Hassan) and alkaline (Mandya) soil. The study revealed that, there was a significant increase in pH of acidic and decrease in pH of alkaline soil compared to control irrespective of application rates of DE under field capacity was recorded over the incubation period. Among the different grades, DE-3 and DE-4 recorded significantly higher acetic acid-Si and CaCl2-Si content at 30 days after incubation in both the soils. Irrespective of different grades of DE, increased rate of application increased the N, P2O5, K, Ca, Mg and S in both the soils. In a pot culture experiment, significantly better performance of rice, increase in the availability and uptake of Si by rice was noticed with the application of DE-4 @ 750 kg ha-1 and DE-4 @ 1000 kg ha-1 in acidic and alkaline soil, respectively. The results of field experiment revealed that, application of DE-4 @ 750 kg ha-1 and DE-3 @ 500 kg ha-1 recorded higher yield of aerobic rice at Hassan and Mandya, respectively. Application of DE-3 @ 500 kg ha-1 and DE-4 @ 750 kg ha-1 recorded higher content and uptake of Si and all other nutrients by rice straw at both the locations. Lower BD and high percentage of maximum water holding capacity and water stable aggregate were recorded with the application of DE-3 @ 500 kg ha-1 at Hassan and DE-4 @ 500 kg ha-1 at Mandya. In a green house with moisture stress experiment, application of DE-4 @ 300 kg ha-1 at 100 per cent FC recorded significantly higher straw weight and leaf relative water content, decreased proline content and electrolyte leakage in both acidic and alkaline soil. Treatment receiving DE-4 @ 300 kg ha-1 at 100 per cent FC recorded higher content and uptake of Si and other nutrients by rice straw in both the soils compared to 100 and 50 percent FC alone.
Subject: Soil Science and Agriculture Chemistry
Theme: EVALUATION OF DIFFERENT DIATOMITE COMPOUNDS ON SOIL PROPERTIES
These Type: Ph.D
Issue Date: 2015-11-04
Appears in Collections:Theses

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