EFFECT OF IRRIGATION, GYPSUM AND PLANT GROWTH REGULATORS ON THE GROWTH AND YIELD OF CHICKPEA [ Cicer arietinum L. ] UNDER SALINE SOIL AND FARM POND SWEET WATER CONDITIONS OF BHAL ZONE OF GUJARAT STATE
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Date
1988
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AAU, Anand
Abstract
An experiment was conducted at tiie National Agricultural Research Project of Gujarat Agricultural University, Arnej (Bhal), district Ahmedabad, during rabi season of 1982-83 and 1983-84 to study the effect of irrigation, gypsum and plant growth regulators On the growth and yield of Chickpea, cv. Chafa under saline soil and farm pond sweet water conditions of Bhal zona of Gujarat State. The soils of the experimental area were clayey in texture (45.42% clay) having total nitrogen 0026 and 0030 per cent, available phosphorus 140 and 18 0 kg/ha and available potash 440.0 and 443.51 kg/ha in the years 1932-83 and 1983-84, respectively in 0-15 cm soil layer. Twenty four treatment combinations consisting of four irrigation treatments viz., No irrigation ( T 0 ) irrigation at pre-flowering stage ( I 1), irrigation at flowering stage (I2 ) and irrigation at preflowering plus flowering stage ( (I3) as main plot treatments two gypsum treatment viz.. No gypsum aplication ( Go ) and application of gypsum @ 4.0 t/ha ( G1 ) as sub-plot treatments; besides three plant growth regulator treatments viz., control (GR0), application of NAA @ 10 ppm ( GR1 ) and application of CCC @ 5O ppm (GR2 ) as sub-sub-plot-treatments were tried in split-split plot design with four replications. Full doze of nitrogen and phosphorous in the form of urea and DAP were applied 10 cm deep in furrows at the time of sowing. Irrigation each of 75 mm depth was scheduled in (I1) (pre-flowering), I2 (flowering) and T3 (pre-flowering plus flowering involving two irrigation. The results indicated that during both the years and in the pooled results irrigating the crop at pre-flowering stage (I1) gave significantly higher grain yield over No irrigation (I0) treatment, but it was comparable with I3 (pre-flowering plus flowering) treatment. The former treatment ( I1 ) enhanced number of pods-plant, pod length and 100-seed weight over No irrigation (I0) treatment. However, all irrigation treatment reduced the WUE gs compared to No irrigation ( I0 ) treatment. Application of irrigation had no consistent effect on protein content of grain. During 1982-83, the treatment I significantly increased the protein content of grain over other treatments. However, the reverse trend was observed in he year 1983-84. I1 treatment gave the heighest net realization of Rs. 1235/ha and net ICBR of 1:3 81 : 2.69 and 1 : 1.27 were recorded during 1982-83, 1983-84 and in the pooled results, respectively. Application of gypsum @ 4.0 t/ha produced significantly higher number of branches/plant, higher number of grains/pod and grain yield over no application during 1983-84 and in the pooled results. This treatment also recorded significantly more CU but, the WUE remained unaltered during both the years of study and in the pooled results. The protein content in grains, number of pods/plant and pod length during both the years and in the pooled results remained unchanged The net realization and net ICBR were considerably reduced with the application of gypsum. Application of NAA @ 10 ppm (GR1) to chickpea crop resulted in significant increase in number of pods/plant, pod length, number of grain/pod, 100-seed weight, protein content in grain, number of nodules/plant and grain yield over those recorded under control treatment during both the years of study and in the pooled results. This treatment also resulted in significantly higher CU during individual years of study. However, the WUE remained unaltered during 1983-84 and in the pooled results. The highest net realization of Rs. 1118/ha (mean of two years) as well as net ICBR of 1 : 1.5 (1883-84) were recorded by application of NAA @ 10 ppm (GR1). The results of the present investigation, thus indicated that potential production and profit from Chickpea under Bhal condition wers secured by irrigating the Chickpea crop at pre-flowering stage ( I1) with 75 mm depth of water without the application of gypsum and growth regulators. Application of NAA @ 10 ppm proved beneficial only under sub-normal year of rainfall.
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AGRONOMY, AGRICULTURE, A STUDY