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由于过量使用化肥和农药 ,造成土壤恶化、环境与作物污染 ,甚至引起人、畜中毒 ,同时也易诱致病虫产生抗药性。所以 ,无公害的生物菌肥、生物农药越来越受到重视。光合细菌作为一种生物制剂 ,能增加绿色植物的光合作用 ,促进多种酶的活性 ,积累干物质。我们在山西祁县思贤村梨
Due to excessive use of fertilizers and pesticides, resulting in soil deterioration, pollution of the environment and crops, and even cause human and animal poisoning, but also easy to induce resistance to pests. Therefore, pollution-free biological fertilizer, biological pesticides more and more attention. Photosynthetic bacteria as a biological agent, can increase the photosynthesis of green plants, promote the activity of a variety of enzymes, the accumulation of dry matter. We are in Shanxi Qixian Sisi village pear