Effect of Moisture Regimes and levels of Iron on Growth and Yield Of Rice under Aerobic condition.
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Date
2015
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Rajendra Agricultural University, Pusa (Samastipur)
Abstract
A field experiment was conducted at Rajendra Agricultural University, Pusa, Bihar during kharif season of 2014 to investigate the “Effect of moisture regimes and levels of iron on growth and yield of rice under aerobic condition”. The treatments consisted of three moisture regimes i.e. I1 (Irrigation at 10% moisture depletion of field capacity), I2 (Irrigation at 20% moisture depletion of field capacity) and I3 (Irrigation at 30% moisture depletion of field capacity) and four levels of iron F1 (Control), F2 (Basal application of 25 Kg FeSO4 +5 t/ha FYM), F3 (3 foliar application of 1% FeSO4 at tillering, pre flowering and flowering stages) and F4 (3 foliar application of 2% FeSO4 at tillering, pre flowering and flowering stages) was laid out in split plot design with three replication. The test cultivar was RAU-4 of short duration variety. The soil of experimental plot was sandy loam in texture, alkaline in reaction (pH 8.6), low in available N (155 kg/ha), P2O5 (20.23 kg/ha), K2O (120 kg/ha) and Fe (6.7 ppm).
The result showed that growth and yield attributes like Plant height, number of tillers/m2, LAI, dry matter production (g/m2), crop growth rate (g/day/m2), SPAD value, number of panicles/m2, number of spikelets/panicle, fertile spikelets/panicle, grain and straw yields, N, P, K and Fe uptake by rice grain and straw, water productivity, net return were found to be maximum with I1 moisture regime which was significantly superior over I2 and I3 but was statistically at par with I2 in case of plant height and Number of tillers/m2 at all growth stages. 1000- grain weight, harvest index, N, P and K content in grain and straw and WUE were not influenced by moisture regimes. Net return and net return per rupee investment were affected significantly due to moisture regimes. The maximum net return and net return per rupee investment were fetched with I1 moisture regime which was significantly superior over other treatments.
Growth and yield attributes like Plant height, number of tillers/m2, LAI, dry matter production (g/m2), crop growth rate (g/day/m2), SPAD value, number of panicles/m2, number of spikelets/panicle, Fertile spikelets/panicle, grain and straw yields, Fe content in grain and straw, N, P, K and Fe uptake by rice grain and straw, WUE were recorded with F4 level of iron which was significantly superior over F1 and F2 but were statistically at par with F3 level of iron. 1000- grain weight, harvest index, N, P and K content in grain and straw did not vary significantly due to levels of iron. Water productivity, net return, net return per rupee investment was significantly influenced by levels of iron. Maximum water productivity (4.38 /ha), net return (24598 /ha), net return per rupee investment (0.80 /ha) were recorded with F3 level of iron which were significantly superior over F1 and F2 but were statistically at par with F4 level of iron.
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