Effects of sewage irrigation on growth of rice seedlings and soil environment with straw incorporation.

doi:10.13287/j.1001-9332.201808.034

Abstract

Abstract: The effects of sewage irrigation on the growth of rice seedlings and soil environment under wheat straw returning were examined with a pot experiment. Root morphology, root activity, tiller number, plant height, dry matter accumulation of rice seedling, soil ferrous ions content, organic acid content and enzyme activity were measured. The results showed that sewage irrigation significantly increased the number of tillers and root activity at 41 days after transplanting under no N fertilizer application. Under the same N input level, sewage irrigation combined with N fertilizer promoted the growth of rice seedlings and root, and increased the root length, root surface area, root volume, root activity, tiller number and dry matter accumulation. Sewage irrigation significantly reduced the contents of soil ferrous ions and organic acid, while significantly increased the activities of soil urease and catalase. These results indicated that the combination of sewage irrigation and N fertilizer could effectively reduce the negative effect of straw returning on rice seedling and thus enhance soil fertility and quality.

LIU Ya-wen, XUE Li-hong, YANG Lin-zhang, WANG Yue-man. Effects of sewage irrigation on growth of rice seedlings and soil environment with straw incorporation.[J]. Chinese Journal of Applied Ecology, 2018, 29(8): 2739-2745.

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