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The Impact of Conservation Tillage on Reduction in Rice Yield Loss:Evidence from 1 080 Chinese Rice Farmers
TANG Li-qun, ZHOU Jie-hong, YU Xiao-hua
JOURNAL OF NATURAL RESOURCES ›› 2017, Vol. 32 ›› Issue (6) : 1016-1028.
PDF(1923 KB)
PDF(1923 KB)
The Impact of Conservation Tillage on Reduction in Rice Yield Loss:Evidence from 1 080 Chinese Rice Farmers
Droughts and floods have become two kinds of major natural disasters causing rice yield loss. The challenges on food security caused by increasing natural disasters have drawn much attention of researchers. Recent studies have identified a variety of effective adaptation measures taken by farmers to cope with natural disasters. Conservation tillage, considered as one of the main adaptation measures, could help farmers reduce yield loss. A three-year survey of 1 080 Chinese rice farms was conducted in major rice producing provinces in China, Zhejiang and Jiangsu in the coastal area of eastern China, Sichuan in southwest China, and Hunan in central China. Based on the panel survey, we identified the factors influencing farmers’ taking measures of conservation tillage, and evaluated the effectiveness of conservation tillage as a main adaptation measure against droughts and floods. Particularly, the behavior of taking the measure of conservation tillage could be endogenous, which has not been well examined in the literature. Taking into account the endogeneity of the behavior, we employed an endogenous switching regression model to estimate the effects of whether or not taking the measure of conservation tillage. The results revealed that the coefficients of droughts and floods for taking the measure of conservation tillage are 0.099 and 0.315 respectively, and both are statistically significant. It is consistent to our common sense that rice farmers are more likely to take the measure of conservation tillage when they have suffered from droughts and floods. Besides, whether farmers take the measure of conservation tillage also depends on labor cost, local access to public services for coping with droughts and floods, the tolerant variety of rice, agricultural labor forces, famers experience on rice production and soil quality. The former four factors can encourage farmers to take the measure of conservation tillage, while more experience on rice production and better soil quality discourage farmers to take the measure of conservation tillage. Moreover, we found that taking the measure of conservation tillage increased the yield by 457.95 kg/hm2 (about 7%). In contrast, the farmers who did not take the measure would increase the rice yield by 225 kg/hm2 (about 4%) if they take the measure. These findings suggest conversation tillage does increase the rice production and help reduce the rice yield loss caused by drought and floods. It also indicates that the possible benefit for those who have not taken the measure of conservation tillage is much smaller than the benefit for those who have already taken the measure.
adaptation / conservation tillage / droughts / floods / rice / yield loss {{custom_keyword}} /
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