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首页> 外文期刊>Gesunde Pflanzen >Influence of soil disinfection methods on the weed seed potential and on microbial activities in the soil.
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Influence of soil disinfection methods on the weed seed potential and on microbial activities in the soil.

机译：土壤消毒方法对杂草种子势和土壤微生物活性的影响。

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In autumn, soil from the upper layer of a long-term weed nursery was sampled. This soil was fumigated with Basamid Granulat (dazomet) or treated with a steamer or remained untreated. During 19 months, germinating weed seeds were counted in representative samples. Both sterilizing procedures nearly eliminated the seeds of annual weeds. Another part of the treated soil was incubated under laboratory conditions up to 12 weeks to investigate biomass-related dehydrogenase activity (DHA) and substrate-induced short-term respiration (KZA) as well as carbon mineralization (LZA), alkaline phosphatase (APA) and arylsulfatase (ASA). The steaming strongly reduced APA, ASA, DHA and KZA whereas Basamid Granulat mostly acted weaker. The LZA was slightly reduced by Basamid Granulat but slightly increased by steaming. Lucerne meal partly modified these effects. In a succeeding trial, the disinfected soil was additionally treated with the herbicidal reference compound Herbogil Liquide D (dinoterb) after 10 weeks. In the not disinfected soil, the herbicide caused a dose-related inhibition of the DHA and, depending on sampling time, lucerne meal or dosage, affected the LZA. In the previously fumigated soil, herbicidal effects may be modified. Overall, the soil disinfection as well as the reference compound impaired the soil biocoenosis..
机译：在秋天，从长期杂草苗圃的上层土壤中取样。用巴沙米粒（dazomet）熏蒸土壤，或用蒸锅处理或不处理。在19个月内，对代表性样品中的发芽杂草种子进行了计数。两种灭菌程序都几乎消除了一年生杂草的种子。将经过处理的土壤的另一部分在实验室条件下孵育长达12周，以研究生物质相关的脱氢酶活性（DHA）和底物诱导的短期呼吸（KZA）以及碳矿化（LZA），碱性磷酸酶（APA）和芳基硫酸酯酶（ASA）。蒸煮可大大降低APA，ASA，DHA和KZA，而Basamid Granulat则表现较弱。 Basamid Granulat稍微降低了LZA，但蒸煮后略微增加了LZA。卢塞恩粉部分地改变了这些作用。在随后的试验中，在10周后，还用除草参考化合物Herbogil Liquide D（dinoterb）处理了消毒过的土壤。在未经消毒的土壤中，除草剂引起DHA的剂量相关抑制，并且取决于采样时间，卢塞恩粉或剂量，会影响LZA。在以前熏蒸过的土壤中，除草效果可能会有所改变。总体而言，土壤消毒以及参考化合物损害了土壤生物群落。

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