Record Details

Microbiological evaluation and nutrient release pattern of soils under tropical agroforestry systems

KrishiKosh

View Archive Info
 
 
Field Value
 
Title Microbiological evaluation and nutrient release pattern of soils under tropical agroforestry systems
 
Creator Rakhi
 
Contributor Goyal, Sneh
 
Subject Farming systems, Biomass, Agroforestry systems, Carbon, Spacing, Nitrogen, crops, land resources, Enzymes, Minerals
 
Description Agroforestry is a form of sustainable land use that combines trees and shrubs with crops and
livestock in ways that provide optimum level of food production, a supply of firewood and cash
benefits, while maintaining soil fertility. It is a conservationist agricultural system that improves soil
organic matter and maintain soil health. Microbiological properties and nutrient release pattern of soils
under 7 yr old poplar trees with cowpea and wheat rotation at research farm CCSHAU, Hisar was
evaluated. Soil samples from different spacings of poplar plantings viz. 5x4m, 10x2m and 18x2x2m
along with crops were analyzed for various chemical and biological parameters. There was less effect
of different spacings of poplar trees on soil pH however electrical conductivity decreased with decrease
in distance between poplar trees Organic C and total N were in the range of 0.38-0.68% and 0.051-
0.071% respectively and was maximum in 5x4m spacings. Total P increased from 110 to 175 mg/kg
soil and available P doubled from 9 to18 mg/kg soil. The percent mineralization rate of carbon and
nitrogen were 4.35% and 4.5%, respectively. Mineralization increased significantly by incorporating
trees with crops. The microbial biomass C and N increased from 147 to 275 and 12 to 36 mg/kg soil
respectively and microbial biomass C:N ratio decreased from 12.25 to 7.64.The dehydrogenase and
phosphatase activity increased from 94 to 205.83 mg TPF/kg soil/24 h and 114.94 to 116.48 mg
PNP/kg soil/h respectively. Community level physiological profile (CLPP) revealed that the microbial
diversity is entirely different in fields with no poplar trees and in fields with poplar plantation along
with crops. There is 80% similarity in microbial diversity of 5x4m and 18x2x2m spacings with 10x2m
spacings. Thus narrow spacings of poplar agroforestry system maintain soil health by improving soil
biological and chemical properties.
 
Date 2016-10-19T09:23:40Z
2016-10-19T09:23:40Z
2015
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/80920
 
Language en
 
Format application/pdf
 
Publisher CCSHAU