| Effects of intercropping of oat on soil enzyme activity, microbial content and yield in arid land |
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| DOI：10.7606/j.issn.1000-7601.2019.02.26 |
| Key Words: oat intercropping soil enzyme activity land equivalent ratio yield arid land |
| Author Name | Affiliation | | WANG Qing-yu | College of Agricultural Sciences, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010010, China | | LI Li-jun | College of Agricultural Sciences, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010010, China | | RUAN Hui | College of Agriculture Sciences,Nanjing Agricultural University,Nanjing, Jiangsu 210095, China | | ZHOU Hong-sheng | College of Plant Protection,Northwest A＆F University,Yangling, Shaanxi 712100, China | | LI Xiao-ting | College of Agricultural Sciences, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010010, China |
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| Abstract: |
| In this paper, the effects of intercropping of gramineae, leguminous and solanaceae on soil biological characters were studied in arid farming area in Inner Mongolia, in order to reveal the dominant mechanism of oat(Avena sativa Linn)on soil enzyme activity, microbial biomass, and land equivalent ratio(LER) compared with intercropping of different crops. There were 7 treatments including sole crop of oat, black bean (Glycinemax (L.) merr), alfalfa (Medicago sativa), potato (Solanum tuberosum L) and intercropping of black bean with oats, alfalfa with oats and potato with oats. The advantages of this mechanism were analyzed for the nature of indicators such as soil enzyme activity and land equivalent ratio. The results showed that the highest equivalent ratio of black bean land was 1.62 and 1.65 in 2015 and 2016, respectively. The soil urease activity and invertase activity of black bean intercropped with oats were significantly increased by 5.00%~51.61% and 5.73%~52.29% compared with alfalfa with oats and potato with oats. The soil catalase activity of alfalfa with oats was significantly higher than that of black bean with oats, 29.47% and 40.56% in 2015 and 2016, respectively. The carbon and nitrogen contents in soil microbial biomass were significantly increased by 2.70%~17.89% and 11.36%~26.47% by the black bean with oat intercropping in those two years. The soil urease activity was increased by 1.51%~55.22% and the sucrase activity was increased by 5.73%~52.29%. Thus, it is the best intercropping mode in the region and can provide theoretical basis. |
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