Effect of subsurface drip irrigation and drip line layering on soil water dynamics and productivity of tomato under protected environment
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Date
2021-09-22
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Palampur
Abstract
The present study was conducted at experimental farm of CSKHPKV, Palampur during
the year 2020 with the objectives to evaluate the effect of subsurface drip irrigation and
drip line layering on soil water dynamics, plant water content & water productivity, and
to evaluate the effect of subsurface drip irrigation and drip line layering on nutrient
uptake and crop productivity. The treatments comprised of two drip irrigation levels 0.4
PE (40 per cent of pan evaporation) and 0.8 PE (80 per cent of pan evaporation) with
five subsurface layering viz., no layering, farm yard manure @ 10 t/ha, rice straw @ 10
t/ha, saw dust @ 10 t/ha, chopped weed biomass @ 10 t/ha. The tomato (Lycopersicum
esculentum) crop was transplanted on May 4, 2020. The experimental results indicated
that the soil water content and soil water stock was higher under 0.8 PE treatments
which led to significantly higher plant height, relative leaf water content, marketable
and straw yield as compared to 0.4 PE treatments. Among subsurface layering, plant
height, marketable and straw yield, total NPK uptake were significantly higher under
farm yard manure and lower under no layering. However, the root growth parameter
was significantly higher under rice straw and lower under no layering. The gross return
and B:C ratio were the highest under 0.8 PE + Farm yard manure and lowest under 0.4
PE + No layering treatment combination. The study concluded that the sub surface drip
irrigation level of 0.8 PE and subsurface layering with Farm yard manure were the
optimum treatment combination for obtaining maximum crop and water productivity