农艺措施对黄淮海平原盐碱障碍农田土壤酶活性的影响

Impacts of Agronomic Measures on Soil Enzyme Activities in Salinization Blocked Farmland in the North China Plain

以黄淮海平原盐碱障碍农田为研究对象,探究了不同农艺措施下土壤脲酶、过氧化氢酶和蔗糖酶活性的变化,以确定改善盐碱障碍农田土壤微环境的适宜农艺技术措施。结果表明,秸秆覆盖、灌水60mm/次和氮素施用量300kg/hm2条件下土壤脲酶活性较当地常规水肥管理分别提高51.07%、47.75%和63.68%;秸秆覆盖和氮素施用量150kg/hm2条件下土壤蔗糖酶活性较当地常规水肥管理分别提高95.24%和81.04%。在黄淮海平原盐碱障碍农田应当推广应用秸秆覆盖并适度增施氮肥。

The impacts of different agronomic measures on soil urease activity, catalase activity and invert- ase activity were investigated to ensure appropriate agronomic technical measures which were used to im- prove soil microenvironment of salinization blocked farmland in the North China Plain. The results indica- ted that compared with local average fertilization and irrigation, soil urease activity increased by 51.07%, 47.75% and 63.68%, respectively, under the conditions of straw mulching, irrigating 60 mm every time and nitrogen fertilization of 300 kg/hm2. Also, soil invertase activity was enhanced by 95. 240/00 and 81.04%, respectively, under straw mulching and nitrogen fertilization of 150 kg/hm2. Straw mulching and moderate increasing nitrogen should be promoted in salinization blocked farmland of the North China Plain.