摘要
通过种植紫花苜蓿(Medicago sativa)和饲用玉米(Zea may. cv.)的田间试验,测定各处理不同土层的土壤可溶性盐分和盐离子含量,研究了其对景泰县引黄灌区土壤盐分的生物抑制效应。结果表明:在0～100 cm的土层中,紫花苜蓿处理土壤平均可溶性盐分含量比对照降低30.1 %,和对照比差异达极显著(SSR0.01);紫花苜蓿处理土壤可溶性盐分、K+、Na+、Ca2+、Mg2+、SO42- 和Cl- 含量降低最显著的是0～20 cm土层,在层次分布上均呈表层低-中层高-下层低的规律。种植饲用玉米的抑盐效应未表现出来,但明显改变了盐离子的比例和分布。生物覆盖对改良盐碱地潜力大,生态、经济效益俱佳,在内陆盐碱地开发具有广泛的农学意义。
Soluble salt content and different salt ions content in fields were measured after planting alfalfa (Medicago sativa) and in forage-maize (Zea may. cv.) for studying their effect on restraining soil salt content in Jing-tai Yellow River irrigation areas. The results showed: In 0～100 cm soil layer, the average soil soluble salt content in alfalfa treatment decreased 30.1 %, the average soluble salt content in alfalfa treatments and the control was very significantly difference (SSR 0.01) on statistic analysis; the average soluble salt, K+, Na+, Ca2+, Mg2+, SO42- and Cl- 0～20 cm soil layer in alfalfa treatment decreased most obviously; With deepening of soil layer, Soil salt ions content of alfalfa treatment was as following: high in surface-low in middle-high in bottom; forage-maize plangting has not obvious effect on restraining soil salt, but it significantly changed the ratio and distribution of salt ions. So it can be regarded that covering with plants will play very important role in both developing economy and improving ecological environment of salty land in the inland.
出处
《甘肃农业大学学报》
CAS
CSCD
2004年第2期168-172,共5页
Journal of Gansu Agricultural University
基金
国家科技攻关西部专项(编号:2001BA901A33)
关键词
紫花苜蓿
饲用玉米
土壤盐分
抑制效应
alfalfa
forage-maize
soil soluble salt
effect of restraining
