摘要
本文论述了河西走廊盐土的地理分布、成土条件、主要亚类、盐分组成及盐的毒害效应.并在草甸盐土上种植了鲁梅克斯草,脱盐改土效果十分明显.种植鲁梅克斯草3～4年,鲜草产量达9.623×104 ～ 9.965×104 kg/hm2,脱盐率达61.78 % ～ 80.71 %,pH由8.50降到8.10,耕作层总孔度增加1.89 % ～ 7.93 %,土壤容重降低0.14 ～ 0.21 g/cm3,水稳性团粒结构增加23.14 % ～ 32.34 %,自然含水量增加72.10 ～ 89.40 g/kg,土壤有机质、速效N、P、K亦随之增加.
Solonchak is widely distributed in Hexi Corridor. In order to rationally exploit the resources, geographic distribution, soil forming conditions, major sub-groups, and composition and toxicity of salts were discussed. An experiment of planting Rumex K-1 was carried out on meadow solonchak with results showing significant effects on desalting and ameliorating the soil. After growing 3 ~ 4 years, yield of the fresh grass reached 9.623?04 ~9.965?04 kg/hm2; 61.78 % ~ 80.71 % of the salts in the soil were removed; pH value decreased from 8.50 to 8.10; total porosity in the soil layer of 0 ~ 20 cm increased 1.89 % ~ 7.93 %; soil bulk density fell 0.14 ~ 0.21 g/cm3; water- stable granular structure rose 23.14 % ~ 32.34 %; nature soil moisture content went up 72.10~89.10 g/kg; and soil organic matter, readily available N, readily available P and readily available K increased too.
出处
《土壤》
CAS
CSCD
北大核心
2004年第1期71-75,共5页
Soils
关键词
草甸盐土
鲁梅克斯
脱盐率
Meadow solonchak, Rumex K-1, Desalinization rate
