大田县干旱型中低产田成因与改良利用对策

Cause analysis on arid medium-low yield field in Datian County and countermeasures for its improvement and utilization

大田县耕地调查结果表明:干旱型中低产田占耕地面积的73.50%,降雨时空分布不均,水利设施调蓄能力差,耕地大多分布在坡地等因素是干旱型中低产田比例大的主要成因。提出加强农田水利设施建设,增强供水能力;增施有机肥和平衡施肥,提高土壤保水能力;推广节水灌溉,提高水分利用效率等改良中低产田技术措施。

Investigative results of cultivated land fertility indicated that the arid medium-low yield field occupied 73.50% total cultivated land area in Datian County. The main causes of formation were un-even distribution of rainfall in time and space, and poor adjustment and storage ability of water conservancy facilities, and cultivated land distributed mostly on the slope. The technical measures to improve arid medium-low yield field were suggested, which include strengthening the construction of water conservancy facilities to increase water supply ability, increasing organic fertilizer amount and applying bal- anced fertilization to improve water-holding capacity of soil, and popularizing water-saving irrigation to enhance water use efficiency.