Resources Science ›› 2017, Vol. 39 ›› Issue (7): 1259-1271.doi: 10.18402/resci.2017.07.04

• Orginal Article • Previous Articles     Next Articles

Conservation tillage,cropping systems and land productivity for households on the Loess Plateau

Wei LI1(), Caixia XUE2(), Shunbo YAO2, Ruixiang ZHU1   

  1. 1. College of Mechanical and Electronic Engineering,Northwest A & F University,Yangling 712100,China
    2. College of Economics and Management,Northwest A & F University,Yangling 712100,China
  • Received:2017-01-10 Revised:2017-04-12 Online:2017-07-20 Published:2017-07-20

Abstract:

Analysis of the impact of conservation tillage technology on land productivity can provide a reference for developing environment-friendly farming techniques and achieve sustainable agricultural development in the Loess Plateau region of China. Based on a survey of 476 wheat-maize planting households on the Loess Plateau, extended C-D function and multiple regression models were used to analyze the effect of conservation tillage technology on land productivity under different planting systems. We found that conservation tillage technology had a significant positive effect on crop yield,but its effect was slow-release. Conservation tillage technology had a positive effect on the profit of average ha in the area of two croppings per year system and three croppings per two-year system. The effect of conservation tillage on profit was more obvious when the opportunity cost of family labor input was taken into account. Seed costs,irrigation costs and machinery costs had a positive effect on crop yield,and the impact of pesticide and herbicide on crop yield depends on whether they were prophylactic or controlled. The education level of the head of the household had a positive effect on land productivity. Without considering family labor costs,the scale of family agricultural labor had a positive effect on average profit per ha. The scale of land management was positively related to crop yield,while land fragmentation hindered increases in farmers’ profits. Irrigation convenience was beneficial to increase the profit of average ha in areas of more than one crop a year. Crop yields and profits were higher in flat areas than sloped areas.

Key words: conservation tillage, land productivity, cropping system, Loess Plateau, extended C-D function model, multiple regression model