Zhang Shi-Chang, Zhang Yu-Lu, Guo Xiao-Jing, Luo Ming, Li Shi-Dong, Guo Rong-Jun
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
College of Agriculture, Xinjiang Agricultural University, Urumqi 830052, China.
Biology (Basel). 2023 Aug 14;12(8):1130. doi: 10.3390/biology12081130.
Long-term overfertilization increases soil salinity and disease occurrence and reduces crop yield. Integrated application of microbial agents with low fertigation input might be a sustainable and cost-effective strategy. Herein, the promoting effects of B006 on the growth of Chinese cabbage under different fertigation conditions in field trials were studied and the underlying mechanisms were revealed. In comparison with normal fertigation (water potential of -30 kPa and soluble N, P, K of 29.75, 8.26, 21.48 Kg hm) without B006 application, the combination of B006 and reduced fertigation input (-50 kPa and N, P, K of 11.75, 3.26, 6.48 Kg hm) promoted cabbage growth and root development, restrained the occurrence of soft rot disease, and improved the yield. High-performance liquid chromatography (HPLC) analyses indicated that B006 application promoted the production of indole-3-acetic acid and salicylic acid in cabbage roots, which are closely related to plant growth. Rhizosphere microbiota analyses indicated that the combination of low fertigation input and B006 application promoted the enrichment of , , , and and the abundance of was positively correlated with the root length and vitality. This suggested that the integrated application of reduced fertigation and is highly efficient to improve soil ecology and productivity and will benefit the sustainable development of crop cultivation in a cost-effective way.
长期过度施肥会增加土壤盐分和病害发生率，并降低作物产量。将微生物菌剂与低灌水量施肥相结合可能是一种可持续且具有成本效益的策略。在此，研究了B006在田间试验中不同灌溉施肥条件下对大白菜生长的促进作用，并揭示了其潜在机制。与不施用B006的正常灌溉施肥（水势为-30 kPa，可溶性氮、磷、钾分别为29.75、8.26、21.48 Kg/hm）相比，B006与减少灌溉施肥量（-50 kPa，氮、磷、钾分别为11.75、3.26、6.48 Kg/hm）相结合促进了白菜生长和根系发育，抑制了软腐病的发生，并提高了产量。高效液相色谱（HPLC）分析表明，施用B006促进了白菜根系中吲哚-3-乙酸和水杨酸的产生，这与植物生长密切相关。根际微生物群分析表明，低灌溉施肥量与施用B006相结合促进了、、、的富集，且的丰度与根长和活力呈正相关。这表明减少灌溉施肥与B006的综合应用在改善土壤生态和生产力方面具有高效性，并将以具有成本效益的方式有利于作物种植的可持续发展。
