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Abstract
This study aims to determine effects of production of Brachiaria decumbens grass on different drought stress treatments. Research was conducted at the Greenhouse Faculty of Agriculture University of North Sumatera from Desember 2016 until April 2017. The design used was Completely Randomized Design (CRD), with three treatments and seven replications. The treatment consisted of three levels of drought stress which were control (100% field capacity=fc), medium drought stress (25% fc), and heavy drought stress (50% fc). The variable were fresh weight production, dry weight production and plant height. The results showed that drought stress treatment control (100% fc) significantly (P<0,05) affect fresh weight production, dry weight production, but not plant height. It is concluded that increasing water volume of field capacity increase production Brachiaria decumbens grass.
Highlights
Drought stress is the condition of the environment of the plant is not receiving enough water intake, so the plant can not do the process of growth and development optimally as well as production declined
Table 1. showed that fresh weight production treatment of C1 of 121,43 g is significantly different from C3 of 92,14 g but not significantly different of C2 of 108,57 g and C2 was not significantly different from C3 treatment
The best drought stress treatment was at C1 of 121,43 g and C2 of 108,57 g and lowest was in treatment C3 of 92,14 g
Summary
Drought stress is the condition of the environment of the plant is not receiving enough water intake, so the plant can not do the process of growth and development optimally as well as production declined. Drought stress affects all aspects of plant growth and metabolism of membrane integrity, including the content of osmotic balance, pigments, photosynthetic activity, decrease in water potential of protoplasm, decreasing growth and decline the diameter of the rod. According to Prawiradiputra et al (2012), Brachiaria decumbens resistant to drought for six months It grows well in any soil type include the sandy soils or acidic soils, very responsive to nitrogen fertilization, are able to grow on steep slopes, do not hold standing water [3]. The nutrient content of the grass is high and best palatability but depending on soil fertility This grass digestibility can reach (50-80%), crude protein from 9-20% depending on soil fertility and management, but may decrease by rapidly depending on age and environmental conditions. The nutrient content of the grass is cruide protein (PK) 7%, ash 6,5% and crude fiber (SK) 35,1% [4]
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