S. K. Patel, Ramjeet Yadav, Balkrishna Namdeo, Nilanjan Chattopadhyaya, Pankaj Kumar
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引用次数: 0
摘要
在实验室实验中，对沙壤土施用了两种新一代除草剂吡嘧磺隆（pyrazosulfuron ethyl），即推荐剂量 15 g a.i. ha-1 (RD)和 30 g a.i. h-1 (2RD)、呋喃唑酮（carfentrazone ethyl）25 g a.i. ha-1 (RD)、50 g a.i. ha-1 (2RD)以及对照（未施用除草剂），以确定它们对土壤中微生物生物量动态的影响。施用吡嘧磺隆乙酯（T1 和 T2）和氟磺隆乙酯（T3 和 T4）后 0 天，未显示出任何显著影响。施用除草剂 7 天后，土壤微生物生物量下降。而施用除草剂 28 天后，与未施用除草剂的地块相比，除微生物生物量磷以外，施用除草剂地块的微生物生物量碳和微生物生物量氮都有明显增加。因此，吡嘧磺隆和乙酰甲羧草醚可能会对土壤中的微生物生物量动态产生短期的短暂变化，而且在施用除草剂 28 天后，使用推荐剂量的吡嘧磺隆和乙酰甲羧草醚不会产生任何有害影响。
Influence of New Generation Herbicide on Microbial Biomass Dynamics in Sandy Loam Soil
A laboratory experiment was conducted with two new generation herbicide pyrazosulfuron ethyl treatments, namely, recommended dose 15 g a.i. ha-1 (RD) and 30 g a.i. h-1 (2RD), carfentrazone ethyl 25 g a.i ha-1(RD), 50 g a.i. ha-1 (2RD) along with control (without herbicide) applied to sandy loam soil to determine their effect on microbial biomass dynamics in soil. The application of pyrazosulfuron ethyl (T1 and T2) and carfentrazone ethyl (T3 and T4) did not show any significant effect at 0 day after application. While, at 7 days after application of herbicide declined soil microbial biomass status. Whereas, at 28 days after application significantly increasement microbial biomass carbon and microbial biomass nitrogen except for microbial biomass phosphorus under herbicidal treatments compared to untreated plot. Hence, pyrazosulfuron and carfentrazone ethyl may cause short term transitory change in microbial biomass dynamics in soil moreover at 28 day after application of herbicide no any harmful effect at recommended dose of pyrazosulfuron ethyl and carfentrazone ethyl.
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