Effects of seven different companion plants on cucumber productivity, soil chemical characteristics and Pseudomonas community

doi:10.1016/S2095-3119(17)61698-8

摘要/Abstract

Abstract: Companion cropping can influence cucumber productivity by altering soil chemical characteristics and microbial communities. However, how these alterations affect the growth of cucumber is still unknown. In this study, seven different plant species were selected as companion plants for testing their effects on cucumber productivity. The effects of different companion plants on changes in soil chemical properties such as electrical conductivity (EC) and contents of essential nutrients as well as the structure and abundance of the soil Pseudomonas community were evaluated. The results showed a higher cucumber yield in the wheat/cucumber companion system than that in the cucumber monocultured and other companion cropping systems. The lowest phosphorus (P) and potassium (K) contents in the soil were found in the cucumber monocultured system, and the highest NO₃⁺-N and NH₄⁺-N contents were observed in the rye/cucumber companion system. PCR-denaturing gradient gel electrophoresis (DGGE) and real-time PCR analysis showed that the trifolium/cucumber companion system increased the diversity of the soil Pseudomonas community, while the chrysanthemum/cucumber companion system increased its abundance. Interestingly, plant-soil feedback trials revealed that inoculating the soil of the wheat/cucumber companion system increased the growth of cucumber seedlings. In conclusion, the effects of different companion plants on cucumber productivity, soil chemical characteristics and the soil Pseudomonas community were different, and wheat was a more suitable companion plant for increasing cucumber productivity. In addition, the altered microbial community caused by companion cropping with wheat contributed to increased cucumber productivity.

Key words: cucumber , companion plants , soil chemical characteristics , Pseudomonas community

. [J]. Journal of Integrative Agriculture, 2017, 16(10): 2206-2214.

CHANG Chun-ling, FU Xue-peng, ZHOU Xin-gang, GUO Mei-yu, WU Feng-zhi. Effects of seven different companion plants on cucumber productivity, soil chemical characteristics and Pseudomonas community[J]. Journal of Integrative Agriculture, 2017, 16(10): 2206-2214.

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