Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810045074
Authors: RAKESH NAIK, R
Advisor: REDDI RAMU, Y
Title: OPTIMISATION OF NUTRIENT MANAGEMENT STRATEGY FOR ENHANCING THE PRODUCTIVITY AND QUALITY OF HYBRID MAIZE (Zea mays L.)
Publisher: Acharya N.G. Ranga Agricultural University
Language: en_US
Type: Thesis
Pages: 159
Agrotags: null
Keywords: OPTIMISATION, NUTRIENT MANAGEMENT, HYBRID, MAIZE (Zea mays L.)
Abstract: A field experiment entitled “Optimisation of nutrient management strategy for enhancing the productivity and quality of hybrid maize (Zea mays L.)” was carried out during rabi, 2015-16 on sandy loam soils of dryland farm of S.V. Agricultural College, Tirupati campus of Acharya N.G. Ranga Agricultural University. The experiment was laid out in a randomized block design with nine treatments and replicated thrice. The treatments consisted of nine nutrient management practices viz., control (T1), 100% RDF (180-60-50 kg N, P2O5 and K2O ha-1 (T2), 125% RDF (T3), 150% RDF (T4), 100% RDF + FYM @ 5 t ha-1 (T5), 100% RDF + 25 kg ZnSO4 ha-1 (T6), 100% RDF + ZnSO4 + FeSO4 each @ 25 kg ha-1 (T7), 100% RDF + sulphur @ 30 kg ha-1 + ZnSO4 + FeSO4 each @ 25 kg ha-1 (T8), 100% RDF + sulphur @ 30 kg ha-1 + foliar application of ZnSO4 and FeSO4 @ 0.5% each at booting and silking (T9). The maize hybrid DHM-117 was tested in the present experiment. At 25 and 50 DAS, the highest stature of growth parameters viz., plant height, LAI and dry matter production were recorded with soil application of ZnSO4 and FeSO4 25 kg each + sulphur 30 kg ha-1 along with 100% RDF (T8), which was however comparable with application of 150% RDF (T4). At 75 DAS and at harvest, foliar application of ZnSO4 and FeSO4 @ 0.5% each at booting and silking + sulphur 30 kg ha-1 along with 100% RDF (T9) resulted in the tallest plants, maximum LAI and the highest dry xvi matter production, which was significantly superior over the rest of the nutrient management practices tried. All these growth parameters were observed the lowest with control (T1), at all the stages of observation. Foliar application of ZnSO4 and FeSO4 @ 0.5% each at booting and silking + soil application of sulphur @ 30 kg ha-1 along with 100% RDF (T9) took significantly lesser number of days to 50% tasseling and silking, while control (T1) has recorded more number of days for 50% tasseling and silking. Different nutrient management practices failed to exert significant influence on number of cobs plant-1 except control (T1), which recorded the lowest number of cobs plant-1. The other yield attributes viz., cob length and girth, number of seed rows cob-1, seeds row-1, seeds cob-1, seed weight cob-1 and thousand seed weight were registered the highest with foliar application of ZnSO4 and FeSO4 @ 0.5% each at booting and silking + soil application of 30 kg sulphur ha-1 along with 100% RDF (T9), which was significantly superior over the rest of the treatments tried. The lowest values of the above said yield attributes were recorded with control (T1). Foliar application of ZnSO4 + FeSO4 @ 0.5% each at booting and silking as well as sulphur @ 30 kg ha-1 along with 100% RDF (T9) recorded the highest seed, stover yield and harvest index than the rest of the nutrient management practices. It accounts for 41.7 per cent higher seed yield over application of 100% RDF alone (T2). The lowest seed and stover yield including harvest index were recorded with control (T1). Among the nutrient management practices tried, foliar application of ZnSO4 and FeSO4 @ 0.5% each at booting and silking + sulphur @ 30 kg ha-1 along with 100% RDF (T9) recorded significantly the highest protein, zinc and iron content in the seed. The lowest protein, zinc and iron content in the seed were resulted with control (T1). The highest nutrient uptake (N, P and K) by maize was registered with application of 150% RDF (T4), whereas foliar application of ZnSO4 and FeSO4 @ 0.5% each at booting and silking + soil application of sulphur @ 30 kg ha-1 along with 100% RDF (T9) recorded significantly higher sulphur, zinc and iron uptake, while it was the lowest with control (T1). The highest gross and net returns with higher benefit cost ratio were obtained with foliar application of ZnSO4 and FeSO4 @ 0.5% each at booting and silking + soil application of sulphur @ 30 kg ha-1 along with 100% RDF (T9) and they were the lowest with control (T1). xvii The highest post-harvest soil available nitrogen, phosphorus and potassium status was recorded with application of 150% RDF (T4), which was significantly superior over the rest of the nutrient management practices tried. Soil application of 25 kg ZnSO4 and FeSO4 each + 30 kg sulphur ha-1 along with 100% RDF (T8) recorded the highest post-harvest soil available sulphur and zinc status. Soil application of ZnSO4 and FeSO4 each @ 25 kg ha-1 along with 100% RDF (T7) recorded higher post-harvest soil available iron status, while the lowest post-harvest available nitrogen, phosphorous, potassium sulphur, zinc and iron were observed with control (T1). From the above experiment, it may be concluded that application of recommended dose of fertilizers (180-60-50 kg N, P2O5 and K2O ha-1) along with soil application of sulphur @ 30 kg ha-1 and foliar application of ZnSO4 and FeSO4 @ 0.5% each at booting and silking stage was the economically viable nutrient management strategy for obtaining higher seed yield of hybrid maize with improved quality in the sandy loam soils during rabi in Southern Agro Climatic Zone of Andhra Pradesh.
Description: D5320
Subject: Agronomy
Theme: OPTIMISATION OF NUTRIENT MANAGEMENT STRATEGY FOR ENHANCING THE PRODUCTIVITY AND QUALITY OF HYBRID MAIZE (Zea mays L.)
Research Problem: OPTIMISATION OF NUTRIENT MANAGEMENT STRATEGY FOR ENHANCING THE PRODUCTIVITY AND QUALITY OF HYBRID MAIZE (Zea mays L.)
These Type: M.Sc
Issue Date: 2016
Appears in Collections:Thesis

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