STUDIES ON GROWTH AND DEVELOPMENT BEHAVIOUR AND EFFECTS OF GROWTH REGULATORS ON CERTAIN GREEN GRAM VARIETIES (Vigna radiata (L.) Wilczek)
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Date
1982
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AAU, Anand
Abstract
The investigation were carried out at the college farm, B.A. College of Agriculture, Anand consisted of two parts. In part-l, nineteen green gram varieties were included for the physiological studies on growth and development behaviour during summer, 1979. From the results of experiment, these "nineteen varieties were grouped into three groups (i) high shedding -group (> 66% ), (ii) low shedding group ( <65% ) and (iii) high yielding group (yield > 750 kg/ha ). Two varieties from each group i. e. Gujarat-2 and ML-12 from first group, A-59-7 and ML-5 from second group and, T-44 and PIMS-1 from third group were selected for further studies. In part-II, the aforesaid six varieties were included to study the effects of growth regulators and their concentrations on yield and yield parameters during two consecutive years in Kharif, 1979 and 1980. Thus, the treatments involved, six varieties, three growth regulators with two levels ( 25 and 50 ppm NA4, 12.5 and 25.0 ppm 2,4,5—T and 50 and 100 ppm SA ) with a common control. The results showed that the varieties ML-12 and Gujarat-2 were more responsive to the growth regulators and they produced higher yields. Among the growth regulators, SA was superior to NAA and 2,4,3-T in producing favourable effects on plant height, number of leaves, number of buds, flowers, pods formed and pods retained per plant, number of seeds per pod, test weight, grain yield, per cent bud, flower, pod and total drop. For nitrogen content of leaves and protein content of seeds, 2,4,5-T showed favourable effects. Lower level of SA (50 ppm ) and 2,4,5-T (12.5 ppm ) were found more effective than higher level of SA ( 100 ppm) and 2,4,5.T ( 25*0 ppm), but there was no adverse effect of higher level of NAA ( 50 ppm ) as compared to lower level of NAA ( 25 ppm ). Highest promoting response was observed with ML-12 followed by Gujarat-2 to all the growth regulators in the decreasing order of SA> NAA> 2,4,5-T in respect of yield
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AGRONOMY, AGRICULTURE, A STUDY