Effect of sowing density of Bromus inermis on soil microbial characteristics and enzyme activities

doi:10.11686/cyxb2017265

Abstract

Abstract: In this study, an experiment with different sowing densities of Bromus inermis: W₁(7.5 kg·ha^-1), W₂(15 kg·ha^-1), W₃(22.5 kg·ha^-1), W₄(30 kg·ha^-1) and W₅(37.5 kg·ha^-1) was conducted to investigate the effect of sowing density on soil microbial characteristics and enzyme (urease, phosphatase and catalase) activities. The aboveground biomass of B.inermis increased with sowing density to W₄(30.0 kg·ha^-1), and then was decreased at W₅ compared to W₄.There was no significant difference between the sowing densities in belowground biomass. For microbial biomass-C, the lowest values occurred at medium sowing densities. Microbial biomass-N in the 0-10 cm soil layer barely changed with sowing density, while in the 10-20 cm soil layer it decreased with increasing sowing density. The soil enzyme activity in the first cutting period was significantly higher than that in the second cutting period, but there was no significant difference among sowing densities within the same regrowth period. Soil microbial characteristics and enzyme activities were optimized at W₄ (30.0 kg·ha^-1).

LI Da, WANG Di, CHEN Jin-qiang, XIN Xiao-ping, XU Li-jun, YANG Gui-xia, TANG Xue-juan, GUO Ming-ying. Effect of sowing density of Bromus inermis on soil microbial characteristics and enzyme activities[J]. Acta Prataculturae Sinica, 2018, 27(1): 53-61.

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