KOM活化堆土壤改良剂改良盐碱土壤的效果与分析

在盐碱较重的40hm2农田上施入KOM制剂，施入量为60kg·hm2，兑水800—1000倍，1个月后分别试验地和对照取样，对土壤物理性质和化学性质进行测试分析，8月上旬对作物长势进行调查测试。调查结果表明：在种植农作物的土壤中施人KOM，通过0．5cm、1．0cm、2．0cm、3．0cm、10．0cm孔径筛的土粒的百分率分别为对照的6．0倍、4．3倍、4．5倍、3．8倍和1．8倍；土壤有机质、水解氮、有效磷和速效钾的含量分别为对照的1．4倍、1．5倍、8．9倍和4．2倍；菜豆豆荚的平均长度16cm左右，而对照不足10cm。在草地施入KOM（在顶极群落羊草未形成的前提下），优势草层高度和草覆盖度分别提高了5个和14个百分点，丰富度指数和多样性指数分别是对照的2．2倍和4．0倍。在苏打盐碱土上施入KOM活化堆土壤改良剂，可显著改善土壤的理化性质，提高土地生产力。

Effect of KOM activation heap soil conditioner on improvement of saline-alkali soil

An experiment for improving salline- alkali soil by application of KOM, an activation heap soil conditioner, was conducted at Shuangliao breeding sheep farm of Siping City, Jilin Province, China in May 2008. Application of KOM salinization cropland of 40 hm2. Soil samples of experimental site and control site were collected after one-month application for analysis of physical and chemical properties of soil, and the crop growth was investigated in August 2008. Results show that on crop site with application of KOM, the percentages of soil particles passing through 0.5 1.0, 2.0, 3.0, and 10.0 cm aperture sieves are 6.0, 4.3, 4.5, 3.8, and 1.8 times, respectively, higher than those of soil particles on the control site. The contents of soil organic matter, hydrolisis nitrogen, effective phosphorus, and fast-acting potassium in the soil with application of KOM were increased by 1.4 times, 1.5 times, 8.9 times and 4.2 times, respectively, as compared with those in control site. The average length of bean pod of Kidney was about 16 cm on the site with application of KOM, while that on control site was less than 10 cm. For grassland with application of KOM, the height of domenaint grass and grass coverage were raised by 5% and 14%, respectively, and the abundance index and the diversity index indices respectively increased by 2.2 times and 4.0 times, as compared with control. It is concluded that application of KOM on salt alkaloid soil can significantly improve the physicochemical property of soil and enhance the productivity of cropland.