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Chaudhary Charan Singh Haryana Agricultural University, Hisar (2019)

Effect of agri-silvi-horticultural system on soil properties under semi-arid condition

Sonia Devi

Titre : Effect of agri-silvi-horticultural system on soil properties under semi-arid condition

Auteur : Sonia Devi

Université de soutenance : Chaudhary Charan Singh Haryana Agricultural University, Hisar

Grade : Master of Science in Soil Science 2019

Résumé partiel
The present investigation entitled “Effect of agri-silvi-horticultural system on soil properties under semi- arid conditions” at Research Farm of Forestry Department, CCS Haryana Agricultural University, Hisar during 2017-18 to evaluate the effect of agri-silvi-horticultural system on soil physical, chemical and biological properties and also to study the effect of agri-silvi-horticultural system on yield and nutrient uptake by wheat. Soil samples from different tree based systems (kinnow + eucalyptus + wheat & kinnow + wheat) and control (devoid of tree) were analyzed for different soil properties at 0-15, 15-30, 30-60 and 60-90 cm depth. Soil pH and electrical conductivity reduced significantly under kinnow + eucalyptus + wheat by 1.5% and 25%, respectively over control. The kinnow + eucalyptus + wheat system showed higher amount for organic carbon and available nutrients (N, P and K) than sole cropping at different depths. The highest soil organic carbon (0.40%) was observed under kinnow + eucalyptus + wheat system followed by kinnow + wheat (0.37%) and it was lowest in system without trees (0.27%). Significant increment in available nitrogen was observed under kinnow + eucalyptus + wheat system by 47.9% and 33.7% under kinnow + wheat system over control. Available nitrogen was also found significantly higher (144.5 kg/ha) at 0-15 cm depth as compared to deeper layers. Different tree based system and depth significantly affected the DTPA extractable micronutrients (Zn, Mn, Cu and Fe) contents in soil. The NH4+-N and NO3—N improved significantly under tree based system. Higher percent addition in dehydrogenase and alkaline phophatase activity was recorded in kinnow + eucalyptus + wheat (69.3 and 33.8% respectively) followed by kinnow + wheat (39.6 and 12.2% respectively) over control. The percent increment for microbial biomass carbon (MBC) and urease activity was highest under kinnow + eucalyptus + wheat (50.3 and 31.9%) followed by kinnow + wheat (28.9 and 12.3%) over control.

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