黄土高原贫困地区农田能量效率与提高途径

Energy Efficiency of Farmland in Poverty-stricken Areas of the Loess Plateau and Approaches for its Improvement.

黄土高原贫困地区主要分布于吕梁山以西至兰州以东的丘陵山区。贫困县有102个,人口2300万,农耕地4.67×10~8ha多,分别占黄土高原总县数的35.7%,总人口的35%,耕地面积的37.5%。其中连片的有山西吕梁山区、陕西榆林地区、宁夏西海固地区及甘肃定西地区。该贫困地区水土流失面积占80%以上,侵蚀模数为5000-1.0×10~4 t·km^(-2),年降水量300—55mm,干旱缺水。

The energy efficiency of farmland was lower in poverty-stricken areas of the Loess Plateau.It had positive correlation with farmland area per capita and negative correlation with cereal area per capita and degree of soil erosion. To improve the energy efficiency,we should control the erosion, improve the agro-ecological environment, abstain from extensive cultivation and increase material input rationally.