Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810101345
Authors: ANJALI BHADRA VIJAY
Advisor: PRASUNA RANI, P
Title: USE OF EXOGENOUS COMPOUNDS AND CROP RESIDUE FOR SALINITY TOLERANCE OF MAIZE
Publisher: Acharya N.G. Ranga Agricultural University
Language: en_US
Type: Thesis
Pages: 161
Agrotags: null
Keywords: EXOGENOUS, COMPOUNDS, CROP RESIDUE, SALINITY, TOLERANCE, MAIZE
Abstract: A green house experiment entitled “Use of exogenous compounds and crop residues for salinity tolerance of maize” was conducted during kharif, 2017 at Agricultural College, Bapatla to study the influence of application of exogenous compounds (humic acid / proline / KNO3) and maize residues (raw / compost) on performance of maize, osmoregulation in plants and soil properties. The experiment was conducted in CRD (Completely randomized design ) with thirteen treatments viz., T1: 100% RDFN, T2 : 125% RDFN, T3: 100% RDFN + extra 25% RDN through raw residue, T4: 100% RDFN + extra 25% RDN through compost and their combination treatments T5 : T2+ humic acid foliar spray @ 0.2% at 20 and 40 DAS, T6 : T2 + Proline foliar spray@ 50 mM L-1 at 20 and 40 DAS, T7 : T2 + KNO3 foliar spray @ 10 g L-1 at 20 and 40 DAS, T8 :.T3 + Humic acid foliar spray @ 0.2% at 20 and 40 DAS, T9: T3 + Proline foliar spray@ 50 mM L-1 at 20 and 40 DAS, T10 : T3+ KNO3 foliar spray @ 10 g L-1 at 20 and 40 DAS, T11 : T4+ humic acid foliar spray @ 0.2% at 20 and 40 DAS, T12 : T4+ Proline foliar spray @ 50 mM L-1 at 20 and 40 DAS, T13 : T4+ KNO3 foliar spray@ 10 g L-1 at 20 and 40 DAS with three replications. The experiment was conducted on a saline soil with ECe 6.8 dS m-1, slightly alkaline reaction, medium organic carbon, low available nitrogen, medium available phosphorus, high available potassium and sulphur and deficient zinc content. Raw maize residue and its compost were added to the respective treatments considering their nitrogen content. Plant and soil samples collected at different stages were analyzed following standard procedures. Use of exogenous compounds (humic acid / proline / KNO3) and maize crop residues (raw / compost) exhibited a significant influence on plant height, grain and stover yield. Addition of 25% extra nitrogen as compost along with foliar spray of KNO3 resulted in the highest plant height and yield followed by its supply with proline foliar spray. The same treatment combinations were found to be superior in maintaining high chlorophyll, RWC, proline, total sugars and required ionic ratios of leaves when compared to raw residue and inorganic treatments alone or in combination with foliar sprays. Supplementation of 25% extra nitrogen through crop residues improved the water holding capacity of saline soil at harvest significantly. The organic carbon content and nutrient content (except potassium at harvest) were found to be significantly influenced by the addition of crop residues either raw or composted at all the crop growth stages. High bacteria, fungi and actinomycetes population and dehydrogenase enzyme activity were observed due to addition of 25% extra nitrogen in the form of either raw or composted maize residue. In general, the treatments supplied with compost performed better in maintaining overall soil health in saline soils. Foliar sprays of exogenous compounds resulted in improved plant performance with no much effect on soil except the microbial population.
Description: D5659
Subject: Soil Science and Agriculture Chemistry
Theme: USE OF EXOGENOUS COMPOUNDS AND CROP RESIDUE FOR SALINITY TOLERANCE OF MAIZE
Research Problem: USE OF EXOGENOUS COMPOUNDS AND CROP RESIDUE FOR SALINITY TOLERANCE OF MAIZE
These Type: M.Sc
Issue Date: 2018
Appears in Collections:Thesis

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