中文摘要：

就当前实物形态和价值形态或市场价值形态核算农业用地利用集约度的缺点，本文引进能值分析科学合理计算黄淮海地区农业用地利用集约度，并分析其时空变化规律。结果显示：①黄淮海地区农业生产自然和社会经济条件优越，农业生产投入集约度整体上显著高于我国农业生产平均投入水平，而且其增长速度也远高于全国平均水平，说明该地区属于我国农业生产中集约利用水平比较高的地区，农业生产综合能值集约度有所降低的地区主要分布在农民外出劳务比较多的地区和经济高度发达的地区；②2001年～2005年黄淮海地区农业资本劳动能值比率值显示出其农业生产现代化水平显著高于全国平均水平并且增长迅速，说明黄淮海地区农业生产以先进的生产工具取代落后的手工工具和人畜为主的劳动的趋势越来越明显；③利用Spearman秩相关系数分析出黄淮海地区各地资本劳动能值比率分别与第一产业从业人员所占比例和城镇人口占总人口的比率成显著相关关系，说明该地区农业现代化的提高有利于农民从农业劳动中解放出来向二、三产业转移。

英文摘要：

The limitation and scarcity in agricultural land resources require improvement to the intensive utilization level of agriculture land use in order to satisfy the growing agricultural products demand for socio-economic growth in China. Due to shortcomings of calculating the intension degree of agricultural land use by means of material possession and value or market price, the authors introduced a theory of emergy analysis to calculate the intensive degree of agricultural land use over the Huang-Huai-Hai region and then rationally analyzed its spatial-temporal distribution patterns. Because of a prominent natural endowment and good socio-economic conditions for agricultural production, the intensive degree of agricultural production investment over Huang-Huai-Hai region is significantly higher than that of average agricultural production investment in China. Overall, the growth rate of the intensive degree of agricultural production investment is much higher than that of the national average, indicating that the Huang-Huai-Hai region remains a high level of agricultural intensive production. The areas with a decreasing trend in intensive degree of agricultural production are primarily distributed over the regions where the number of migrant workers going out to work is relatively larger and over economically developed regions. The ratio between Agricultural Production Capital and labor input emergy over Huang-Huai-Hai region in period 2001-2005 was significantly higher than that of national average and is growing rapidly. This shows an obvious trend in replacement of the labor power depending on backward hand-tools and livestock by advanced agricultural production tools. It was also found through Spearman rank correlation coefficient analysis that the ratio between Agricultural Production Capital and labor input emergy over Huang-Huai-Hai region is highly correlated to the percentage of the population employed in the primary industrial and the fraction of the unban population to the total population, This indicate