How to make use of the land resources effectively and improve the cultivated land intensive degree is the main problem of the current scientific research.Based on the present situation of cultivated land intensive use in Harbin city, the paper revealed cultivated land intensive use trends and influencing factors by using the method of combination weighting in entropy and coefficient of variation, BP neural network, barrier factor diagnostic, and so on.It aimed to provide a theoretical principle for cultivated land intensive use.The results showed that: (1)the value of cultivated land intensive use was 0.3462 in 1985-2014 in Harbin city, which increased to 0.475 in 2015-2024 year and showed a high intensive state.From 1985-2024, the overall level of cultivated land intensive use was 0.4096 and showed a relative intensive state in the 40 years.(2)The impact of cultivated land output efficiency and investment intensity on intensive use of arable land become large and presented a rising trend.The land production efficiency and input intensity annually increased 8.69% and 7.82%, while the land use degree and land use sustainability decreased 4.86% and 5.73%.the main obstacle factors of cultivated land intensive utilization level were irrigation index, farmers in per unit of cultivated land area, agricultural output ratio, grain yield per unit of sown area, and so on.It concluded that the method of BP neural network could provide the theoretical principle for predicting the trend of cultivated land intensive use in Harbin city.
intensive use of cultivated landpredict researchBP neural network methodbarrier factor diagnostic methodHarbin city
NETL
NSTL
万方数据
维普
