摘要
陕北黄土丘陵沟壑区是陕西省光资源比较丰富地之一,年总辐射量高达127.0—142.0千卡/厘米~2;热量资源能够保证秋作物的正常生长发育和产量的形成;年降雨量的60—70％集中在作物的积极生长季节。雨热同期对农业生产极为有利。但该区由于降雨量少、分配不匀、蒸发势强,干旱频繁、限制了光热资源生产潜力的发挥,为了合理开发利用,拟将该区划分为四个农业气候类型区——长城沿线高寒风沙半干旱气候区、黄河沿岸寒温半干旱气候区、中部寒凉半干旱气候区,西部高寒半干旱气候区,并根据各气候区特点,提出农业发展方向。
The hilly and gully region in North Shaanxi is one of the regions with abundant light resources. Total amount of rediation per year reaches as high as 127.0-142.0 kcal/cm^2. The heat resources can fully ensure the normal growth and development of autumn crops and their yield formation.The 60—70% of annua rainfall concentrates on the seasons of active crop growth. Rainfall and heat resources in the same Beasons is extremely favourable for agricultural production. Owing to less raonfall with an uneven distribution and great evaporation potential in this region,the frequent droughts have limited the full development of production potential of light and heat resources. In order to make rational development and utilization of these resources, it is necessary to classify into four types of agricultural climatic regions——the high cold and wind drift semiarid climatic region along the Great wall;the cold and tempeate and arid climatic region along the banks of the Yellow River; the cold and cool and semiarid climatic region in the central; and the high cold and semiarid climatic region in the west. Based on the climatic characteristics, the developing direction of agriculture in this region is suggested in this paper.
出处
《干旱地区农业研究》
CSCD
北大核心
1989年第2期44-51,共8页
Agricultural Research in the Arid Areas
