以下为句子列表：
英文: 18 strains of Actinomyce are isolated from rhizosphere of different crops in the arid area of the Northern mountain in Yuzhong County of Gansu Province.
中文: 摘要从榆中县北山干早地区不同作物根际土壤中，分离到18株放线菌菌株，对其形态特徵、在6种培养基上的培养特徵以及生理生化特徵进行了较详细的研究。
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英文: Abstract: By analysis on the physical and chemical properties of rhizosphere and nonrhizosphere soils of Zanthoxylum bungeanum with soil and water conservation economic benefits in Karst valley of Guizhou province,the soil characteristics suiting Zanthoxy
中文: 文摘:测定了贵州喀斯特峡谷水保经济植物花椒根际和非根际土壤的理化性质；探讨了适宜花椒生长的土壤特性；提出了发展花椒生产的主要技术措施。
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英文: In the 3 soil textures the dynamic change of rhizosphere microorganisms and enzyme activities both turned on a parabola with the peak in the silking stage, and then reducing gradually.
中文: 3种土壤玉米根际生物活性的动态变化呈抛物线，吐丝期达最大值，此后逐渐下降。
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英文: The rhizosphere microflora dynamics of bacteria, actinomyces, fungi and four bacterial physiological groups of Kentucky bluegrass under different quality of illumination were studied by adopting selective culture medium to explain scientifically response
中文: 摘要研究了草地早熟禾在不同光照条件下其根际与非根际细菌、真菌、放线菌以及氨化细菌、硝化细菌、好气性纤维素分解菌、固氮菌生理类群的区系动态变化，拟从根际土壤微生物数量变化方面来阐述草地早熟禾对不同光照条件的响应规律。
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英文: The self-poisoning effects of Chinese fir plantation are studied through the seed germination experiment with the extracts of organs ,bulk soils and rhizosphere soil of different rotation plantations.The results are as follows:there are some poisonous sub
中文: 利用不同栽植代数杉木人工林根际土、非根际土及杉木各器官浸提液进行杉木种子发芽试验，研究杉木人工林自毒作用，研究结果表明：杉木林根际土及非根际土中均存在抑制杉木种子萌发的物质，随栽植代数增加抑制作用更趋明显；杉木各器官浸提液对杉木种子萌发也有抑制作用，其中以杉木叶的抑制作用最为明显，杉木林下常见植物对杉木种子发芽则表现为低促高抑效应，说明杉木人工林存在自毒作用，这可能是杉木连栽障碍的原因之一。
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