JOURNAL OF NATURAL RESOURCES ›› 2018, Vol. 33 ›› Issue (5): 735-746.doi: 10.11849/zrzyxb.20170505

• Resource Ecology • Previous Articles     Next Articles

Appraisal on Ecological Services from Chinese Milk Vetch-Early Rice-Late Rice Cropping Ecosystem

XIE Zhi-jian1a, HE Ya-qin1b, XU Chang-xu2   

  1. 1. a. College of Land Resource and Environment, b. School of Economics and Management, Jiangxi Agricultural University, Nanchang 330045, China;
    2. Institute of Soil & Fertilizer and Resource & Environment, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China
  • Received:2017-05-25 Revised:2017-09-04 Online:2018-05-20 Published:2018-05-20
  • Supported by:
    National Key Research and Development Program of China, No. 2017YFD0200808 and 2016YFD0200808.

Abstract: Cultivating winter green manure crops (e.g. Astragalus sinicus L., etc.) after the harvest of main crops (e.g. rice, etc.), which was the essence of traditional agriculture and has made important contribution to food security, is a very important strategy for optimizing the agricultural cropping structure in China. Evaluating the economic values on the main ecological services of Chinese milk vetch (CMV)-early rice-late rice cropping ecosystem will help people better understand the importance of CMV to modern ecological agriculture development and its direct contribution. Furthermore, it will be conducive to the development and promotion of planting winter green manure crops (e.g. CMV) and help governments making policies. In this study, based on the data of a continuous field location experiment from 2007 to 2015 and the agro-ecosystem service appraisal theories, the economic values of CMV-early rice-late rice rotation system in South China were evaluated by developing a systematic model with methods of eco-economics. This model mainly estimated the economic values by considering the influences of CMV on four ecological functions, i.e., agricultural product and industrial raw materials, atmospheric regulation and purification, water conservation, and soil nutrient accumulation. Results showed that the total economic values of ecological services in CMV-double rice rotation system (87 438.46 yuan/(hm2·a)) was 36.13% higher than that from fallow-double rice system (64 230.89 yuan/(hm2·a)). The economic values of agricultural product and industrial raw material in fallow- and CMV-double rice cropping ecosystems were 38 777.03 yuan/(hm2·a) and 56 635.83 yuan/(hm2·a), respectively, which accounted for 60.37% and 64.77% of the total values, followed by the economic values of atmospheric regulation and purification and water conservation (accounted for 15%-22%). The economic value of soil nutrient accumulation (accounted for less than 2%) was the least one in double-rice cropping system. The economic value of soil nutrient accumulation was mainly because of increasing economic values of the accumulative soil organic matter, available potassium and alkali-hydro nitrogen in CMV-double rice rotation system. Hence, the CMV-early rice-late rice rotation system has both economic values and ecological values. The results can provide theoretical basis for making ecological compensation policies of redeveloping and promoting winter green manure crops (e.g. CMV) in paddy fields of South China.

Key words: Chinese milk vetch-double rice cropping system, ecological services, field location experiment, paddy field

CLC Number: 

  • S55