摘要
针对塑料大棚盐渍化土壤常用的灌水洗盐方式,通过小区和原状土柱模拟灌水洗盐试验,研究了灌水洗盐降低土壤盐渍化的效果及其通过径流和渗漏流失对水环境的氮磷污染负荷。结果表明:灌水洗盐能降低表层土壤盐分53%～64%、土壤硝态氮55%～60%,但使表层土壤速效磷增加了1.0～1.5倍;洗盐过程中通过径流和渗漏流失进入水环境的氮磷污染负荷为硝态氮7.66kg/hm2、铵态氮0.77kg/hm2、总氮12.71kg/hm2和总磷1.27kg/hm2。
According to typical method of saliferous soil washed by water in protected agriculture, the reduction of saline matter in soil and the water pollution load of nitrogen and phosphorus by runoff and leakage were studied with plot scale experiments and indoor soil column experiments. The results showed that 53% - 64% of saline matter and 55% - 60% of nitrate nitrogen were reduced, respectively, while 1.0 - 1.5 times of available phosphorus was increased in topsoil after saliferous soil was washed; the total water pollution loads of nitrogen and phosphorus by runoff and leakage were 7.66 kg/hm2 of nitrate nitrogen, 0.77 kg/hm2 of ammonium nitrogen, 12.71 kg/hm2 of total nitrogen and 1.27 kg/hm2 of total phosphorus, respectively.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2005年第1期124-127,共4页
Transactions of the Chinese Society of Agricultural Engineering
基金
上海市环境保护科学技术发展基金科研项目(沪环科攻关-02-03)
关键词
塑料大棚
土壤盐渍化
灌水洗盐
面源污染
氮磷
plastic greenhouse
saliferous soil
water-washed
non-point source pollution
nitrogen and phosphorus
