Study on microclimate of cluster bean [Cyamopsis tetragonoloba (L.) Taub.] cultivars under two crop row orientations
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Date
2021-07
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CCSHAU, Hisar
Abstract
The field investigation on “Study on microclimate of cluster bean [Cyamopsis tetragonoloba (L.) Taub.] cultivars under two crop row orientations” was carried out during Kharif season 2020-21 at Research area, Department of Agricultural Meteorology, Research Farm, Chaudhary Charan Singh Haryana Agricultural University, Hisar. The treatment consisted of two crop row orientations D1 (East-West) and D2 (North-South) and three cultivars/varieties V1 (HG 365), V2 (HG563) and V3 (HG 2-20). These eighteen plots were evaluated in factorial randomized bock design with three replications. The North-South crop row orientation had a higher seed yield owing to its greater number of pods/plant as compared to East-West crop row orientation. The cultivar HG 2-20 similarly had a higher seed yield due to more pods/plant. There was no difference between crop row orientations in the occurrence of phenophases but variety HG 2-20 had a longer reproductive phase i.e. it entered flowering stage earlier and matured later. The LAI of cluster bean increased up until around 70 DAS after then started decreasing while dry matter accumulation kept on increasing up until maturity. Both row orientations intercepted through their entire canopy the same amount/percentage of total incident PAR. However, variety HG 2-20 intercepted more par as compared to other varieties. All cultivars and crop row orientations had similar kind of relative humidity and temperature profiles with diurnal variations being lowest at bottom of the canopy and highest at the top of canopy. The top of canopy was much closer to the ambient environment as compared to bottom of the canopy. The correlational analysis of yield attributes and weather parameters and agrometeorological indices showed that negative correlation with temperature especially with night time and relative humidity especially evening RH. However, crops planted in North-South row orientation were less affected. Cluster bean crop was significantly positively correlated with sunshine duration and heat units as well.