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通过对自然集雨区水分动态10年定位观测研究,初步明确了我国亚热带丘岗区生态系统水资源的分布特征与水平衡状况。该区域雨水丰沛,总量可维持系统水分平衡,但其时空变化大,加之蒸发变化与之错位和土壤持蓄水分性能差等因素作用,导致系统水分盈亏现象发生,水分“高盈期”的湿害和“亏缺期”的伏旱严重制约了丘岗区农业的发展。强化工程、农艺措施调控能力,提高农业水资源管理水平,是促进我国亚热带丘岗区农业持续稳定发展的技术保障。
Through the 10-year observation of the water dynamics in the natural rain catchment, the distribution characteristics and water balance of the water resources in the subtropical hilly areas of China were tentatively determined. The abundant rainfall in this area can maintain the system water balance, but its spatiotemporal change is great. In addition, the change of evaporation and its dislocation and the poor water holding capacity of soil lead to the phenomenon of moisture gain and loss of water system. The “high surplus period” The wet damage and the “deficit period” of the drought severely restricted the development of agriculture in Yugang District. Strengthening engineering, agronomic regulation and control capabilities to improve the level of agricultural water resources management is to promote the sustainable development of agriculture in subtropical hilly areas of our country technical support.