تحقیق در مورد ضزیب موثر و شاخص بهره وری منابع منابع زمین زیر کشت؛ استان هنان چین به عنوان یک مطالعه موردی

Based on the background of construct the national grain strategy project of Henan province core and construct Zhongyuan Economic Zone, considering the Henan province's cultivated land resources use efficiency and food security, using multiple linear regression model and the principal component analysis to analyze the cultivated land resources’ use efficiency between 1999-2008 of Henan province, drew this decade, cultivated area remain basically stable, Cultivated land utilization overall efficiency is high, and established the food production, even in successive years grain output reached a high yield, population density, urbanization rate, per capita GDP, multiple crop index, per hectare fertilizer rate is the greatly influenced factors of influence cultivated land resource utilization efficiency. The main factor that influences grain output has converted from per hectare fertilizer to the quantity and quality of labors in per hectare; the increase of multiple crop index and level of agricultural mechanization are the important factors that influence the grain output. Finally, proposed to improve the cultivated land resource utilization efficiency of Henan province and rational utilization of cultivated land resources countermeasures. Based on the analysis above, this paper indicate that: 1) Promote urbanization, strengthen land management to protect cultivated land resources; 2) Control copulation and improve land use efficiency; 3) Improve water resources in a rational allocation between sectors; 4) Increase input in agriculture, science and technology, to improve land productivity.

1) The evaluation result which is tes ted by PCA clearly shows that as time goes on, the cultivated land use benefit is closely related to the social economic devel opment of a region. Cultivated land use benefit is strongly influenced by social and eco nomic conditions. labours on per unit area of the cultivated land, urbanization rate, agriculture investment proportion, the food productio n of per unit area of the cultivated land, the amount of chemical fertilizer used on per hectare cultivated land and agricultural machinery on per hectare cultivated land reflect the developmen t level of the overall regional economy, while the irrigation index and multiple crop index belong to natural conditions, reflecting the intensification degree of the cultivation operation and the productivity in natural conditions. (2) The urban construction and industry occupy lots of cultivated land, and have serious effect on the cultivated land use benefit. Thus, ur banization rate, agriculture investme nt proportion and the production of the per unit area affect the result of cu ltivated land use benefit in different aspects. The decrease of numbers of farmers indicates the increase of the urban populati on; the rise of the urbanization rate shows the acceleration of urbanization and the transition from agriculture to industry. It can also be known that the industrial scale is enlarging, and more cultivated land is occupied. In mo re and more areas, the action that using land to attract business and investment has caused large areas of land, especially rich cultivated land to be occupied, some occupied land even has never been used. Because of those occupied cultivated land, most is the land with high or medium production, and is mainly located in areas surrounding cities with higher production, the production proportion of the occupied la nd is much higher than proportion concerning to the area. Meanwhile, with the rapid development of sc ience technology, the amount of fertilizer used and agriculture machinery on per hectare area make the rise of the per unit area yield. In recent years, the country has attached more and more importan ce to the cultivated land protection and grain production, and brings grain production and food protection into its scientific schedule. However, using chemical fertilizer on a large scale will have side effect on the environment, though it can increase the grain production.