OPTIMIZATION OF WEED MANAGEMENT THROUGH AGRO-TECHNIQUES IN AEROBIC RICE (Oryza sativa L.)
| dc.contributor.advisor | Kalyana Murthy, K. N. | |
| dc.contributor.author | HABIMANA SYLVESTRE | |
| dc.date.accessioned | 2020-10-03T06:19:32Z | |
| dc.date.available | 2020-10-03T06:19:32Z | |
| dc.date.issued | 2019-10-14 | |
| dc.description.abstract | The weed management investigations were carried out on red sandy loam soil with medium in available NPK during summer 2017 and 2018 at Zonal Agricultural Research Station (ZARS), Bengaluru, consisting of two different field experiments which were laid out in a Randomized Complete Block Design. The results of the experiment on standardization of the agro-techniques for weed management in aerobic rice revealed that application of pyrazosulfuron ethyl 10 % WP @ 35 g a.i. ha-1 as pre-emergence spray followed by bispyribac sodium 10 % SC @ 30 ml a.i. ha-1 as early post-emergence spray recorded significantly lower weed density, weed dry weight and weed index (3.80 %) due to higher weed control efficiency (90.52 %). This helped in obtaining higher rice grain and straw yield (5800 & 9786 kg ha-1, respectively), plant height (58.42 cm), total dry matter production (149.84 g plant-1), productive tillers hill-1 (40.32), panicle length (24.53 cm), 1000 grain weight (25.35 g), net returns (`62424 ha-1) and B:C ratio (2.59). Another experiment on weed management in aerobic rice through intercropping recorded higher crop biomass and higher weed suppression. Sole rice was densely infested by weeds and also had higher weed biomass compared to the intercrops. However, intercrops suppressed efficiently the weeds, increased crop growth and rice equivalent yield over the sole rice crop. The intercropping system of rice with leafy palak vegetable (spinach) was the most suppressive of weeds. Among the treatments, rice + leafy vegetable palak recorded significantly lower weed density (138.4 NO. m-2), dry weight at harvest (148.04 g m-2), higher weed smothering efficiency (46.95 %), higher rice grain, rice straw and palak leaf yield (7651; 9687 and 25508 kg ha-1, respectively), higher rice equivalent yield and land equivalent ratio (16153 kg ha-1 and 2.13, respectively), besides the higher gross returns (`2,56,842 ha-1), net returns (`2,12,860 ha-1) and B:C ratio (5.84) over the sole rice. | en_US |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810152235 | |
| dc.keywords | WEED MANAGEMENT, pyrazosulfuron, equivalent yield | en_US |
| dc.language.iso | English | en_US |
| dc.pages | 268 | en_US |
| dc.publisher | UNIVERSITY OF AGRICULTURAL SCIENCES, GKVK BENGALURU | en_US |
| dc.sub | Agronomy | en_US |
| dc.theme | WEED MANAGEMENT THROUGH AGRO-TECHNIQUES | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | OPTIMIZATION OF WEED MANAGEMENT THROUGH AGRO-TECHNIQUES IN AEROBIC RICE (Oryza sativa L.) | en_US |
| dc.type | Thesis | en_US |