河南省旱地农业区总土地面积 7.6 7万ｋｍ2 ,占河南省土地面积的 4 5 .9% ;其中 ,耕地面积 2 5 3万ｈｍ2 ,占河南省耕地面积的 38%。这些地区土壤瘠薄 ,十年九旱 ,耕作粗放 ,植被稀疏 ,水土流失严重 ,生态环境差 ,制约了该区农业经济的发展。但该区光照充足 ,热量充沛 ,昼夜温 The total land area of ​​dryland agriculture in Henan Province is 7.67 million km2, accounting for 45.5% of the total land area in Henan Province, of which 25.3 million hm2 are cultivated land, accounting for 38% of the cultivated land in Henan Province. In these areas, the soil is infertile, with ten years and nine dry seasons, extensive cultivation, sparse vegetation, serious water and soil loss and poor ecological environment, restricting the development of agricultural economy in the area. However, the area is well-lit, with plenty of heat and warm day and night