Management requirements of mungbean (Vigna radiata (L) Wilczek) after paddy rice
1991
Sriyapala, K.G.
Minimum tillage increased plant height, leaf area index before pod filling stage, crop growth rate before flowering, number of pods, number of branches, leaf number per plant and grain yield of mungbean. Application of rice straw mulch increased dry matter yield, crop growth rate, leaf area index, plant height, seed number per pod, and pod number, branch number, leaf number, node number and nodule number per plant while it reduced total weed dry weight and conserved more soil moisture within the soil profile. The effects of rice straw mulch on these parameters were more pronounced under 8 tons per ha mulch treatment. However, soil moisture content and branch number, nodule number and node number per plant were only slightly different between 4 and 8 tons per ha rice straw mulch treatments. Mungbean grain yield was significantly increased with increasing mulch rate. When plant protection density was increased from 200,000 to 600,000 plants per ha, grain yield, crop growth rate, leaf area index and plant height increased, while seed number per pod, and pod number, branch number, leaf number, and nodule number per plant decreased. Moreover, weed dry weight at the later stage of crop growth also decreased. Mungbean grain yield and weed dry weight did not significantly change from 400,000 to 600,000 plants per ha with 8 tons per ha mulch treatment in both minimum and zero tillage condition. This study showed that the best treatment combination for maximum grain yield of mungbean grown after paddy rice is minimum tillage with 8 tons per ha rice straw mulch at 400,000 plants per ha plant density.
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