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Evaluation of integrated responses of tillage and herbicides on weeds, soil biochemistry and productivity of wheat (Triticum aestivum L.) in the Eastern Sub-Himalayan plain of India
Cereal Research Communications ( IF 1.6 ) Pub Date : 2022-01-08 , DOI: 10.1007/s42976-022-00243-8
Suchitra Roy 1 , Tarun Paul 1 , Kousik Nandi 1 , Partha Sarathi Patra 2 , Prithusayak Mondal 2
Affiliation  

A field experiment was conducted during the winter seasons of 2017–18 and 2018–19 at Uttar Banga Krishi Viswavidyalaya, Cooch Behar, West Bengal, India to study the impacts of tillage and herbicides on weeds, biochemical properties of soil, and productivity of wheat. Tillage systems had similar weed diversity, density and weed control index (WCI), whereas there were significant effects due to weed control treatments. Two hand weeding had superior weed control followed by Glyphosate 41% SL @ 2.5 L ha−1 + (Sulfosulfuron 75% + Metsulfuron methyl 5% WG) @ 40 g ha−1 and (Sulfosulfuron 75% + Metsulfuron methyl 5% WG) @ 40 g ha−1, as this treatment resulted in flat weed diversity, density, highest WCI, upsurge in grain yield and furthermore enriched biochemical properties of soil. Conventional tillage (CT) system recorded lower weed density than reduced tillage (RT) and zero tillage systems. Convincingly, low weed density, dry matter and highest WCI were recorded in two hand weeding at 20 and 40 days after sowing followed by herbicidal treatments at 40 and 60 DAS. Higher grain yield obtained with CT (3.48 t ha−1 and 3.88 t ha−1) was statistically at par with RT (3.12 t ha−1 and 3.59 t ha−1). Among the weed control treatments, hand weeding at 20 and 40 DAS generated more grain yield (3.61 t ha−1) during 2017–18 and Glyphosate 41% SL 2.5 l ha−1 + (Sulfosulfuron75% + Metsulfuron methyl 5% WG) @ 40 g ha−1 generated higher grain yield (3.90 t ha−1) during 2018–19. Soil organic carbon, soil available N, P2O5, and exchangeable K2O were found non-significant due to tillage systems. Expressively higher soil organic carbon, soil available N, P2O5, and exchangeable K2O were recorded with (Sulfosulfuron 75% + Metsulfuron methyl 5% WG) @ 60 g ha−1 and (Sulfosulfuron 75% + Metsulfuron methyl 5% WG) @ 40 g ha−1. In CT, higher bacterial and actinomycetes colonies were found which was at par with RT. Herbicidal treatments recorded a higher number of bacterial and actinomycetes colonies and a lower number of fungal colonies.



中文翻译:

印度喜马拉雅东部平原耕作和除草剂对杂草、土壤生物化学和小麦 (Triticum aestivum L.) 生产力的综合反应评价

在 2017-18 和 2018-19 冬季期间,在印度西孟加拉邦 Cooch Behar 的 Uttar Banga Krishi Viswavidyalaya 进行了一项田间试验,以研究耕作和除草剂对杂草、土壤生化特性和小麦生产力的影响. 耕作系统具有相似的杂草多样性、密度和杂草控制指数(WCI),而杂草控制处理的效果显着。双手除草具有优异的杂草控制能力,其次是草甘膦 41% SL @ 2.5 L ha -1  +(磺隆 75% + 甲磺隆 5% WG)@ 40 g ha -1 和(磺隆 75% + 甲磺隆 5% WG)@ 40 克公顷-1,因为这种处理导致杂草多样性、密度、WCI最高、粮食产量增加,并进一步丰富了土壤的生化特性。常规耕作 (CT) 系统记录的杂草密度低于减耕 (RT) 和零耕系统。令人信服的是,在播种后 20 天和 40 天进行双手除草,然后在 40 天和 60 天除草处理后,记录了低杂草密度、干物质和最高 WCI。使用 CT(3.48 t ha -1 和 3.88 t ha -1)获得的更高谷物产量在统计学上与 RT(3.12 t ha -1 和 3.59 t ha -1)相当。在杂草控制处理中,20 和 40 DAS 的手工除草产生了更多的谷物产量(3.61 t ha -1) 在 2017-18 年期间,草甘膦 41% SL 2.5 l ha -1  +(磺隆75% + 甲磺隆 5% WG)@ 40 g ha -1在 2018-19 年期间 产生了更高的粮食产量(3.90 t ha -1)。由于耕作系统,发现土壤有机碳、土壤有效 N、P 2 O 5和可交换 K 2 O 不显着。土壤有机碳、土壤有效 N、P 2 O 5和交换性 K 2 O 在 60 g ha -1 和(磺隆 75% + 甲磺隆 5% 时使用(磺隆 75% + 甲磺隆 5% WG)记录WG) @ 40 克公顷-1. 在 CT 中,发现了较高的细菌和放线菌菌落,与 RT 相当。除草处理记录的细菌和放线菌菌落数量较多,而真菌菌落数量较少。

更新日期:2022-01-09
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