Vol. 6, Issue 2 (2018)
Growth, physiological behaviour, yield, nutrient uptake and economics of drought tolerant rice (Oryza sativa L.) varieties under various crop establishment methods and moisture conservation techniques in sandy loam soils of western U.P
Author(s): Rajendra Kumar, Adesh Singh, Rohit Kumar and UP Shahi
Abstract: A field experiment was conducted during kharif season of 2016 at Crop Research Centre, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut (U.P.) India to study the performance of drought tolerant rice (Oryza sativa L.) varieties under different establishment methods and moisture conservation techniques. Four crop establishment methods (PTR, UPTR, DSR with wheat straw and DSR without wheat straw mulch), three varieties (Sahbhagi, IR 64 and IR 64 drt 1) and two moisture conservation practices (application of pusa hydrogel @ 1.5 kg acre-1 and no application) were tested in split-split plot design with 3 replications. Results revealed that the growth parameters viz., plant height, dry matter production, chlorophyll content and yield attributing characters of rice viz., panicle length (26.1 cm) and number of filled grains panicle-1 (113.2) were significantly higher under PTR rice whereas, the number of effective tillers m-2 (227.0) and test weight (22.55 g) was highest under DSR with wheat straw. At the time of harvesting, significantly tallest plants (101.8 cm) were recorded in PTR followed by DSR with wheat straw mulch (94.7 cm), though the shortest plants were recorded under DSR without straw mulch. At harvest, DSR with wheat straw produced 3.8% more rice dry matter m-2 than DSR without wheat straw. The PTR rice exhibited 13% more grains yield as compared to DSR with wheat straw whereas, 6.2% more straw yield of rice was recorded under DSR with wheat straw as compared to PTR. The highest total nitrogen (92.0 kg ha-1) and phosphorus (15.0 kg ha-1) uptake was recorded under PTR whereas, the potassium (105.2 kg ha-1) under DSR with wheat straw. The variety IR 64 produced significantly highest dry matter (1115.4 g m-2), effective tillers m-2 (207.3), panicle length (25.2 cm), filled grains panicle-1 (93.2), test weight (22.41 g), besides 8.0 and 18.6% more grains yieldha-1 than Sahbhagi and IR 64 drt 1.The highest nutrient, protein content and total uptake of NPK (11.53, 15.38 and 13.02% more over Sahbhagi, respectively) was recorded under IR 64 which produced 8.1 and 15.7% more gross and net returns than Sahbhagi. The application of pusa hydrogel @ 1.5 kg acre-1 over no application at harvest resulted into 4.1, 6.0 and 5.8% more plant height, number of tillers m-2 and dry matter production m-2, respectively. This treatment also had significantly (8.1, 5.5 and 5.0%) more total uptake of NPK, respectively, besides higher gross returns ha-1. Among the crop establishment methods, PTR fetched 9.5 and 11.1% more gross and net returns, respectively along with B:C ratio over DSR with wheat straw.
Pages: 3047-3053 | 475 Views 57 Downloads
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How to cite this article:
Rajendra Kumar, Adesh Singh, Rohit Kumar, UP Shahi. Growth, physiological behaviour, yield, nutrient uptake and economics of drought tolerant rice (Oryza sativa L.) varieties under various crop establishment methods and moisture conservation techniques in sandy loam soils of western U.P. Int J Chem Stud 2018;6(2):3047-3053.
