EFFECT OF INTEGRATED NUTRIENT MANAGEMENT ON SOIL FERTILITY, SOIL ENZYME ACTIVITIES AND THEIR INFLUENCE ON FRUIT YIELD, NUTRIENT UPTAKE AND QUALITY OF TOMATO (Lycopersican esculentum L.)
KrishiKosh
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Title |
EFFECT OF INTEGRATED NUTRIENT MANAGEMENT ON SOIL FERTILITY, SOIL ENZYME ACTIVITIES AND THEIR INFLUENCE ON FRUIT YIELD, NUTRIENT UPTAKE AND QUALITY OF TOMATO (Lycopersican esculentum L.)
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Creator |
CHAITANYA, T
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Contributor |
PADMAJA, G
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Subject |
organic fertilizers, vegetables, nutrients, fertilizers, fruits, enzymes, harvesting, crops, yields, biological development
SOIL FERTILITY, SOIL ENZYME, FRUIT YIELD, Lycopersican esculentum L. |
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Description |
The present investigation entitled “Effect of integrated nutrient management on soil fertility, soil enzyme activities and their influence on fruit yield, nutrient uptake and quality of tomato (Lycopersican esculentum L.) was carried out under field conditions during 2010 in kharif season to study the effects of integrated nutrient management on performance of tomato crop in terms of yield and nutrient uptake. The transformation of applied N and K into various fractions in relation to their availability was studied besides monitoring the changes in soil enzymatic activity. The experiment was conducted in randomized block design with ten treatments replicated thrice. The treatments include, T1 (Control), T2 (50% RDNF through inorganic fertilizer + 50% RDNF through vermicompost), T3 (75% RDNF through inorganic fertilizer + 25% RDNF through vermicompost), T4 (100% RDNF through vermicompost), T5 (100% RDNF through inorganic fertilizer), T6 (50% RDNF through inorganic fertilizer + 50% RDNF through poultry manure), T7 (75% RDNF through inorganic fertilizer + 25% RDNF through poultry manure), T8 (100% RDNF through poultry manure), T9 (50% RDNF through vermicompost + 50% RDNF through poultry manure) and T10 (50% RDNF through inorganic fertilizer + 25% RDNF through vermicompost + 25% RDNF through poultry manure). The soil under study was slightly alkaline (7.9) in reaction, non saline (0.13 dS m-1) in nature and low in organic carbon (4.6 g kg-1), low in available nitrogen (230.7 kg N ha-1), medium in available phosphorus (25.4 kg P2O5 ha-1) and potassium (284.5 kg K2O ha-1). The effect of different treatments were evaluated in terms of dry matter production (vegetative, flowering and at harvest) and tomato fruit yield. Plant samples were analyzed for their per cent nutrient composition with respect to N, P and K at vegetative, flowering and at harvest and nutrient uptake was computed. The fresh fruit samples ware analysed for quality viz., ascorbic acid and lycopene contents. Soil nutrient status with regard to available N, P2O5 and K2O were studied at vegetative, flowering and at harvest of tomato crop. The influence of INM was evaluated for soil biological health by assaying soil urease, phosphatase and dehydrogenase activities. The results of the experiment showed that the performance of tomato crop improved significantly with integrated use of vermicompost or poultry manure and nitrogen fertilizers when compared to application of either recommended doses of N as inorganic fertilizer or organic manures alone. The nutrient uptake, dry matter, fruit and haulm yields of tomato were highest under 25 per cent level of organic manure application in combination with 75 per cent of inorganic fertilizer. Application of organic manures in combination with inorganic fertilizer increased the availability of nutrients to tomato crop at different growth stages. Urease activity was highest under 25 per cent level of organic manure application in combination with 75 per cent of inorganic fertilizer, while the phosphatase and dehydrogenase activities were highest under 100 per cent organic manure applied plots. Among the different treatment combinations, highest fruit yield (84.97 q ha-1) was recorded at T3 (75% RDNF + 25% VC) followed by T7 (75% RDNF + 25% PM) and T5 (100% RDNF). However, the values were on par with each other and superior over other treatments. The quality parameters viz., ascorbic acid (30.83 mg 100g-1) and lycopene content (4.05 mg 100g-1) were influenced by organic manures. Gross returns were highest under 25 per cent level of organic manure application in combination with 75 per cent of inorganic fertilizer followed by 100 per cent inorganic fertilizer alone. However, net returns and B:C ratio were highest under 100 per cent inorganic fertilizer followed by 25 per cent level of organic manure application in combination with 75 per cent of inorganic fertilizer because of cost prohibitiveness of VC and PM. Based on the results of this study, it can be concluded that the combined use of 75% RDNF + 25% of N through VC or PM is the best for obtaining highest yield apart from maintaining soil biological activity and soil fertility for longer period. |
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Date |
2016-05-31T14:21:54Z
2016-05-31T14:21:54Z 2011 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/66487
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Language |
en
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Relation |
D8909;
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Format |
application/pdf
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Publisher |
ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY
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