Rice bean (Vigna umbellata) is a neglected legume regarded as a minor food and fodder crop in Nepal and northern India, and grown in a range of cropping systems with maize during summer, as a sole crop in the uplands, on rice bunds or in home gardens. It is mainly grown for human consumption, though it is also used for fodder and green manure. There has been very little research or development support for this crop and farmers mainly grow landraces. There is relatively very less published literature on rice bean regarding its area coverage, production, productivity, utilisation and marketing. It is grown by subsistence farmers in a very limited scale and most of the produce is consumed at home although, there is a limited market for a short period each year. The crop contributes to household food security as several food items are prepared from rice bean and also it is culturally important and is thought to have important nutritional values. Rice bean foliage and dry straw are valuable livestock feed and when used as a green manure it improves soil fertility. Thus, rice bean is a vibrant potential fodder legume crop which has capacity to provide balance diet to the livestock and to sustain under wide range of climatic condition. But, there is need to focus on the crop for more popularity as a potential legume crop.
The impacts on yields of cluster bean were assessed for normal (15 July) and late (30 July) sowing environments and foliar spray of thiourea (500, 1000 ppm) and salicylic acid (50, 100 ppm) at 45 and 60 days after sowing (DAS).Significantly higher yield parameters, yield, economics, protein content and nutrient uptake were recorded with foliar spray of thiourea at 500 ppm as compared to all other bio regulator sprays. Similarly, spray of salicylic acid at 100 ppm enhanced yield and other growth parameters which were statistically at par with those for thiourea 500 ppm foliar spray at 45 and 60 DAS. The data show that the foliar application of bio regulators at normal sowing date enhances seed yield of clusterbean by improving the physiological processes. The interaction effects were significant between the sowing date and bio-regulators on the seed yield. The highest seed yield of 993 and 845 kg/ha was obtained with foliar spray of thiourea at 500 ppm in normal and late sowing, respectively, while the lowest yield of 775 and 769 kg/ha was obtained for the water spray control in normal and late sowing, respectively.
An experiment was conducted during kharif season of 2014, aims of the experiment were to investigate suitable sowing environment and bio-regulator and its effect on clusterbean (Cyamopsis tetragonoloba (L.) Taub.), experimental treatments were applied foliar spray of thiourea (500, 1000 ppm) and salicylic acid (50, 100 ppm) at 45 and 60 days after sowing under normal (15 July) and late (30 July) sowing environments. Normal sowing performed well as compared to late sowing, in respect to all morphology and yield parameters. Amongst foliar spray, significantly higher plant height (100.17 cm), number of branches per plant (7.99), leaf area index (4.85), seed yield (9.19 q/ha) and harvest index (29.39) were recorded in foliar spray of thiourea 500 ppm as compared to all other bio-regulators spray level. Similarly, salicylic acid 100 ppm found statistically at par with thiourea 500 ppm foliar spray at 45 and 60 DAS. Impacts of climate change have significant reflections on clusterbean productivity. Sowing dates plays a vital role to determining the productivity of clusterbean with bio-regulators spray by controlling the environmental factors.
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