EFFECT OF DIFFERENT SOURCES OF SOIL NUTRIENT APPLICATIONS ON SOIL FAUNA IN SUNFLOWER ECOSYSTEM
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Date
2017-11-02
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
The investigation on the effect of different sources of soil nutrient applications on
soil fauna in sunflower ecosystem was carried out at the ZARS, University of
Agricultural Sciences, GKVK, Bangalore, during 2016-17. Soil application of 15 t of
FYM/ha + introduced consortia of soil fauna treatment documented significantly higher
abundance of total mesofauna (15.08), Collembola (2.45),cryptostigmatids (3.12),other
Acari (7.25) and total Acari (10.54) compared to rest of treatments during cropping
season. The highest population of total soil mesofauna was noticed 90 (16.50) days after
sowing. The same treatment recorded significantly higher available nitrogen (311 kg/ ha),
available phosphorus (122 kg/ha), available potassium (235 kg/ha), exchangeable
calcium (6.83 meq/100 g) and soil microbial biomass C (3852.05 μg/g soil) at 45 days
after sowing. STCR integrated practices with introduced consortia of soil fauna treatment
recorded higher grain yield (28.55 q/ha) compared to recommended package of practices
alone (17.81 q/ha). Soil mesofauna was positively related with all chemical and microbial
parameters. These showed 31.8 % of impact on the soil mesofaunal activity. Soil
moisture and atmospheric maximum temperature showed significantly positive and
negative relationship with the abundance of soil mesofauna respectively. These factors
together with rainfall exhibited significant influence on the abundance of mesofauna
(89.2%).
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