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description Journal article public Agrimeta

Neraca Air Di Mintakat Perakaran Pada Berbagai Sistem Tanam Di Desa Pecatu, Badung, Bali Selatan

I. Made Sukerta, Bagus Putu Udiyana, I. Dewa Nyoman Raka
Published 2015

Abstract

The actual crop evapotranspiration can be calculated by using equation of soil moisture balance at the experimental plot under different cropping system. Field research was conducted during October 2010 up to June 2011 on drylands of Pecatu village, Badung. Cassava is planted simultaneously at the rainy season, groundnut is planted at the first dry season after harvest time of maize. The measurement of soil moisture content used the gravimetry method and by using tools of The Neutron Probe Type IH2 DIDCOT Wallingford, England. Total of soil moisture storage was calculated until the soil depth of 45 cm. Deep percolation was assumed as zero and surface run-off was estimated by using the method of SCS-USDA. Evapotranspiration of intercropping system was higher than monoculture system. Total of rainfall (P) on the cassava cropping (UK)Â was 2,416.50 mm and run-off (R) was 507.96 mm, and the gradient of soil moisture storage (DS) was 821.20 mm, so cropping water requirement (ET) of cassava was 1,087.34 mm. Rainfall (P) and run-off (R) in the casava cropping on the UKJ and UKJKT were the same, but DS on UKJ treatment was 819.65 mm and on UKJKT treatment was 798.55. Rainfall in groundnut cropping on UKJKT treatment was 1,169.40 mm, run-off (R) was 250.52 mm, and DS was 439.14 mm, so crop water requirement of groundnut with UKJKT treatment was 479.74 mm. Tuber yield of cassava on UK treatment was 24.19 ton/ ha, on UKJ treatment was 23.94 ton/ ha, and on UKJKT treatment was 22.54 ton/ ha. Grain yield of maize on UKJ and UKJKT treatments were 5.44 ton/ ha. However grain yield of groundnut on UKJKT treatment was 0.17 ton/ ha. Results of this research suggest that intensity of dryland use can be improved by optimizing the soil moisture storages.Â

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