Journal of Ecology and Rural Environment ›› 2018, Vol. 34 ›› Issue (8): 717-725.doi: 10.11934/j.issn.1673-4831.2018.08.007

Previous Articles     Next Articles

Spatial and Temporal Variation Characteristics of the Main Agricultural Inputs in Sichuan Province and the Influencing Factors

WANG Qi1,2, ZHANG Hui3, LIAO Gui-tang3, LAN Ting1,2, GAO Xue-song1,2, QIAO Shan-bao4, YAO Xing-zhu5   

  1. 1. College of Resources, Sichuan Agricultural University, Chengdu 611130, China;
    2. Institute of Resources and Geography Information Technology, Sichuan Agricultural University, Chengdu 611130, China;
    3. Institute of Soil Fertilizer and Resource Environment, Sichuan Agricultural Bureau, Chengdu 610041, China;
    4. Plant Protection Station, Sichuan Agricultural Bureau, Chengdu 610041, China;
    5. Remote Sensing Application Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
  • Received:2017-10-16 Online:2018-08-25 Published:2018-08-23

PDF (PC)

672

Abstract:

Due to the worsening resource and environmental problems throughout the world, the rational use of agricultural inputs for the green development and structural reform of agricultural supply front has become increasingly important. The present situation of main agricultural inputs, including fertilizers, pesticides, and agricultural films of five different agricultural zones in Sichuan Province was investigated. Analyses were conducted on the basis of past statistical data. Results show that the total amount of fertilizer application had been increasing in the past 60 years, and the application amounts in four zones exceeded the limit standard of developed countries (225 kg·hm-2). Organic fertilizers showed an opposite trend. The fertilizer input exhibited a structural imbalance with a high nitrogen content. Fertilizer efficiency varied among agricultural zones, in which the Northwestern Plateau had the highest efficiency (25.72 kg·kg-1), whereas the Panxi Mountain Region had the lowest efficiency (13.14 kg·kg-1). The total application amount of pesticides increased by 56.96% between 1993 and 2013. The amount for the Chengdu Plain (6.17 kg·hm-2) was three times as much as that for the Panxi Mountain Region. The input structure was irrational and concentrated on insecticide. The total amount of agricultural films increased by 290% from 1993 to 2013. Most were mulch films, of which only 10% were degradable. Agricultural input intensity was positively correlated with planting convenience and urbanization rate but negatively correlated with planting structure. Planting structure adjusted rapidly with the market economy, which led to the emergence of environmental risks due to increasing chemical input intensity for large plantation of cash crops. For these reasons, highly efficient techniques for environmental protection must be promoted to solve the problems of increasing amounts of agricultural inputs, regional unbalance, and irrational structure. Planting structure should also be optimized and circular agriculture should be developed according to local conditions. Proper management mode and unified management with agricultural mechanization should be encouraged. Furthermore, subsidies that focus on high-technology products and services must be implemented.

Key words: agricultural inputs, spatial and temporal variations, influence factor, strategies of “reducing quantity and increasing efficacy”

CLC Number: