Chemical fertilizers can supply essential nutrients to crops increasing their yield, however, they can also cause serious environmental problems. Biofertilizer has received more and more attention because of its environmentally friendly and pollution-free characteristics. Haloxylon ammodendron, a desert succulent shrub, has become an important plant species for vegetation restoration in several deserts in China because of its strong drought tolerance. Its extensive root systems and unique rhizosphere bacterial community aid H. ammodendron adapt to this extreme environment. In this study, Bacillus sp. WM13-24 and Pseudomonas sp. M30-35 isolated from the rhizosphere of H. ammodendron in our previous study and Bacillus amyloliquefaciens GB03 and Sinorhizobium meliloti ACCC17578 as well-studied beneficial strains were used to prepare two types of biofertilizer, WM13-24 biofertilizer containing Bacillus sp. WM13-24 and integrated biofertilizer containing all the four strains. Results presented here showed that WM13-24 biofertilizer and the integrated biofertilizer improved chili plant growth, fruit yield and quality and the rhizosphere soil nitrogen content, enzyme activities, and the quantity and biodiversity of viable bacteria. Compared to the control, WM13-24 biofertilizer and a commercial biofertilizer, the integrated biofertilizer performed best in significantly increasing plant height, stem diameter, leaf length and width, chlorophyll content, fruit yield, soluble sugar content, ascorbic acid content, organic acid content, soil urease activity, catalase activity and the quantity and biodiversity of viable bacteria. This study provided a theoretical and practical basis for large scale development of integrated biofertilizers using beneficial rhizobacterial strains from the desert plant rhizosphere.

中文翻译：

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含有有益根际细菌的生物肥料改善了辣椒 (Capsicum annuum L.) 的植物生长和产量

化肥可以为作物提供必需的养分，提高其产量，但也会造成严重的环境问题。生物肥料以其环保、无污染的特性越来越受到人们的关注。梭梭是一种荒漠多肉灌木，因其较强的耐旱性，已成为我国若干荒漠植被恢复的重要植物种。其广泛的根系和独特的根际细菌群落有助于 H. ammodendron 适应这种极端环境。在这项研究中，芽孢杆菌属。WM13-24 和假单胞菌属。从 H. 根际分离的 M30-35。我们之前研究中的 ammodendron 和解淀粉芽孢杆菌 GB03 和中华根瘤菌 ACCC17578 作为经过充分研究的有益菌株被用来制备两种类型的生物肥料，含有芽孢杆菌的 WM13-24 生物肥料。WM13-24 和包含所有四种菌株的集成生物肥料。此处显示的结果表明，WM13-24 生物肥料和综合生物肥料改善了辣椒植物的生长、果实产量和质量以及根际土壤氮含量、酶活性以及活细菌的数量和生物多样性。与对照、WM13-24 生物肥料和商业生物肥料相比，综合生物肥料在显着增加株高、茎直径、叶长和宽度、叶绿素含量、果实产量、可溶性糖含量、抗坏血酸含量、有机酸含量、土壤脲酶活性、过氧化氢酶活性以及活菌的数量和生物多样性。该研究为利用来自沙漠植物根际的有益根际细菌菌株大规模开发综合生物肥料提供了理论和实践基础。