PERFORMANCE OF RICE VARIETIES WITH VARYING IRRIGATION REGIMES UNDER AEROBIC CONDITION
| dc.contributor.advisor | S.S. Parihar | |
| dc.contributor.author | DEEPAK | |
| dc.date.accessioned | 2016-11-30T14:47:11Z | |
| dc.date.available | 2016-11-30T14:47:11Z | |
| dc.date.issued | 2011 | |
| dc.description | T-8505 | en_US |
| dc.description.abstract | Aerobic rice cultivation is an agro-adoptive water-saving technique practised in rice. It mitigates the water scarcity in agriculture and increase water-use efficiency in rice. Rice adapted to aerobic condition requires less water than that grown under conventional irrigation management. A field study was conducted at IARI, New Delhi during the kharif season of 2010 to find out the suitable irrigation regime and variety of rice under aerobic condition. The treatment consisted of three irrigation regimes i.e. -10, -20 and -30 kPa soil water potential and four varieties i.e. Jaldi Dhan 6, PNR 162, PNR 381 and Pusa 834. Total water applied was 953.7 mm, 853.7 mm, and 753.7 mm in irrigation at -10 kPa, -20 kPa and -30 kPa, respectively, with the effective rainfall of 503.7 mm. We found that the magnitude of vegetative growth of plants such as plant height, number of tillers per m2, dry matter accumulation, leaf area index, crop growth rate at 30 and 60 days after sowing (DAS) and at harvest stage was significantly higher in irrigation at -10 kPa soil water potential over that produced in irrigation at - 20 kPa and -30 kPa soil water potential. Among the varieties, PNR 162 produced the maximum plant height, whereas the maximum number of tillers/m2, dry matter accumulation at harvest, leaf area index, were recorded with the variety Pusa 834. However, the highest dry matter accumulation at 30 DAS and 60 DAS was observed with Jaldi Dhan 6. The yield attributes (number of panicles per m2, length of panicle, total number of grains per panicle, number of filled grains per panicle) was highest under irrigation at -10 kPa soil water potential with the variety Pusa 834. Similar result was observed in terms of weight of grains per panicle, weight of panicle, 1000- grain weight and crop yield (grain yield, straw yield and harvest index). Similarly, Pusa 834 gave significantly higher grain yield compared to other three varieties. Irrigation at -10 kPa and -20 kPa gave similar field water use efficiency of 0.35 kg grain/m3 of water which is higher than that of -30 kPa (0.29 kg grain/m3 of water). Whereas, irrigation use efficiency was higher at -30 kPa (0.89). Interaction effects indicated that variety Pusa 834 along with irrigation regime of -10 kPa produced significantly higher yield than the other treatment combinations. Highest gross return (39,399 /ha), net return (19,881 /ha) and benefit cost ratio (1.02) was observed in irrigation regime at -10 kPa followed by irrigation at -20 kPa. Among the varieties II Pusa 834 has given the highest net return (21,860 /ha) and benefit cost ratio (1.17) followed by PNR 162 (18,379 /ha and 0.99). Interaction effects indicated that Pusa 834 with -10 kPa of irrigation regime gave maximum net return ( 26,111 /ha) and benefit cost ratio (1.34). | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/88439 | |
| dc.publisher | IARI, WATER TECHNOLOGY CENTRE | en_US |
| dc.sub | Water Science and Technology | |
| dc.these.type | M.Sc | |
| dc.title | PERFORMANCE OF RICE VARIETIES WITH VARYING IRRIGATION REGIMES UNDER AEROBIC CONDITION | en_US |
| dc.type | Thesis | en_US |