文献类型： 外文期刊

作者： Hong, Xi ¹ ; Ma, Chao ² ; Gao, Jusheng ³ ; Su, Shiming ⁴ ; Li, Tao ⁴ ; Luo, Zunchang ¹ ; Duan, Ran ⁴ ; Wang, Yanan ⁵ ; Bai, ¹ ;

作者机构： 1.Soil & Fertilizer Inst Hunan Prov, Changsha 410125, Hunan, Peoples R China

2.Anhui Agr Univ, Sch Resources & Environm, Anhui Prov Key Lab Farmland Ecol Conservat & Poll, Hefei 230036, Anhui, Peoples R China

3.Chinese Acad Agr Sci, Qiyang Agroecosyst Natl Field Expt Stn, Inst Agr Resources & Reg Planning, Qiyang 426182, Hunan, Peoples R China

4.Chinese Acad Agr Sci, Minist Agr China, Key Lab Agroenvironm, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China

5.Chinese Acad Agr Sci, Minist Agr China, Key Lab Agroenvironm, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R C

关键词： Long-term field experiment; Nitrogen and phosphorus balance; Red paddy soil; Rice-rice-green manure rotation; Soil nitrogen and phosphorus increases

期刊名称：JOURNAL OF SOILS AND SEDIMENTS （ 影响因子：3.308； 五年影响因子：3.586 ）

ISSN： 1439-0108

年卷期： 2019 年 19 卷 1 期

页码：

收录情况： SCI

摘要： PurposeAlthough green manure rotation is often used to promote soil fertility and crop yield, the effects of this management practice on the nitrogen or phosphorus balance and the relationship between nutrient balance and the increase in soil nutrients have not been systematically studied.Materials and methodsWe investigated the apparent nitrogen and phosphorus balances and their associations with soil nitrogen and phosphorus increases, respectively, in a 34-year-old experimental site with various green manures and rice rotations using linear and logistic models. Cropping treatments included a rice-rice-winter fallow treatment as a control (RRW) and three green manure rotation treatments: rice-rice-ryegrass (RRR), rice-rice-oil rape (RRO), and rice-rice-Chinese milk vetch (RRC).Results and discussionWe found that apparent nitrogen and phosphorus balances of RRR, RRO, and RRC were 164, 162, and 149kghm(-2), which were all significantly lower than 200kghm(-2) of RRW (P<0.05). Moreover, the optimal fitted model of the relationship between cumulative nutrient balance and the increase in soil nutrients was different among treatments. Specifically, the correlation coefficients of cumulative nitrogen balance and soil nitrogen increase of RRR, RRO, and RRC in the linear model (0.49, 0.80, and 0.63) were all significantly lower than in the logistic model (0.81, 0.90, and 0.82). The correlation coefficients of cumulative phosphorus balance and increase in soil phosphorus of RRW in the linear model (0.81) were significantly lower than in the logistic model (0.91). Parameter analysis of the optimal fitted model revealed that RRC would increase the storage capacity of soil nitrogen and decrease the rate of soil phosphorus accumulation.ConclusionsOur results suggested that long-term rice-rice-green manure rotation could significantly change the apparent nitrogen and phosphorus balance and their association with soil nitrogen and phosphorus content, respectively. Our study highlights the importance of green manure rotation in an agro-ecological environment and soil fertility in a double rice cropping system in red paddy soil.