In addition, we take farmland transfer as a moderation variable to explore whether the farmland transfer significantly alleviates the abandonment of farmland. Therefore, we combined the large-scale sample survey (5479 samples) and geographical analysis to distinguish FTF and FLF, and use logistic regression and Tobit regression model to analyze the impact of FTF on farmland abandonment. However, it is still unclear whether the farmland tenure fragmentation (FTF) aggravates farmland abandonment and its extent when the farmland landscape fragmentation (FLF) remains unchanged. Both farmland fragmentation has different effects and different management strategies. These findings suggest that solving the problem of farmland fragmentation can effectively reduce irrigation water consumption, realize the internal expansion of the oasis through intensive land use, and relieve the pressure of the external expansion of the oasis.įarmland fragmentation is an important factor of farmland abandonment in China, including landscape fragmentation in biophysical conditions and tenure fragmentation in property conditions. In addition, with the increase in the proportion of farmland, the scale of oasis decreases by 2431.56 km2 for the reduction in field roads, shelterbelt, and bare land. When the total farmland area is assumed to remain unchanged, the irrigation water consumption is reduced by 4.82 × 108 m3 according to the size and proportion of arable land with the lowest degree of fragmentation (L1, division value of 0.46). A lower DIVISION value corresponded to a higher ET value, a lower ETs/ETc ratio, and a higher water use efficiency. In addition, a significant relationship between farmland fragmentation and evapotranspiration and its components was evident. The results showed that the farmland area of the Hotan Oasis increased from 1546.19 km2 in 2000 to 2068.23 km2 in 2020, and farmland landscape fragmentation increased with the expansion of the Hotan Oasis. Additionally, the impact of fragmentation on irrigation in the oasis was elaborated upon by exploring the relationship between evapotranspiration and its components in farmland fragmentation.
This paper used the landscape quantitative index (DIVISION), the moving window method, and gradient analysis methods to study the temporal and spatial pattern changes in farmland fragmentation in the Hotan Oasis.
Therefore, investigating the impact of farmland landscape fragmentation on agricultural irrigation is of great significance in developing oasis agriculture. However, farmland landscape fragmentation leads to land being wasted and increases management costs, particularly in the dryland’s oasis regions. Farmland landscape fragmentation is an important problem affecting the agricultural modernization process in China.
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