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Co-incorporation of Rice Straw and Green Manure Benefits Rice Yield and Nutrient Uptake

文献类型： 外文期刊

作者： Yang, Lu 1 ; Zhou, Xing 2 ; Liao, Yulin 2 ; Lu, Yanhong 2 ; Nie, Jun 2 ; Cao, Weidong 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Minist Agr & Rural Affairs, Key Lab Plant Nutr & Fertilizer, Beijing 100081, Peoples R China

2.Hunan Acad Agr Sci, Soil & Fertilizer Inst Hunan Prov, Changsha 410125, Hunan, Peoples R China

3.Minist Agr & Rural Affairs, Sci Observing & Expt Stn Arable Land Conservat Hu, Changsha 410125, Hunan, Peoples R China

期刊名称：CROP SCIENCE （ 影响因子：2.319； 五年影响因子：2.631 ）

ISSN： 0011-183X

年卷期： 2019 年 59 卷 2 期

页码：

收录情况： SCI

摘要： Rice (Oryza sativa L.) straw is commonly incorporated into paddy soil after harvest, although it is not fully understood how the straw return strategy and its co-incorporation with legumes affect soil productivity and rice performance. A 5-yr experiment was conducted in a rice-rice-fallow or rice-rice-Chinese milk vetch (Mv, Astragalus sinicus L.) rotation in South China. Six treatments were included (i) a control with no fertilization and residue return, (ii) 100% of fertilizer recommendation (F-100), (iii) 80% of F-100 plus conventional return of rice straw (F-80 Rs), (iv) F-80 plus Mv planting and incorporation (F-80 Mv), (v) co-incorporation of F-80 Rs and F-80 Mv (F-80 RsMv), (vi) similar to F-80 RsMv except late rice straw was retained as high stubble (similar to 35 cm, F-80 RhMv). The results showed that, under reduced inorganic fertilizer input, grain yields in treatments with straw and/or Mv return were similar with those of F-100. However, N uptake in early and late rice markedly increased by 8 to 14% and 30 to 53% in the co-incorporation treatment F-80 RsMv compared with F-100, respectively, as well as in the F-80 RhMv treatment for late rice. Significantly greater fertilizer use efficiency was obtained in the co-incorporation practices. Although negative cumulative effects were observed for soil organic matter, total N, and available N after 5-yr rotation, the magnitude of decline in the co-incorporation treatments was much smaller than in others. Soil available P and K were accumulated in co-incorporation practice, whereas pH was less affected. Overall, the study suggested that the combination of rice straw and leguminous green manure is a promising practice to produce more grain yield with less fertilizer inputs in subtropical double-rice production.

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