摘要
在荒漠化土壤上进行了免耕留茬秸秆覆盖、免耕留茬、传统土壤耕作的田间比较试验.结果表明,免耕留茬秸秆覆盖对河西走廊荒漠化土壤农田生态环境具有良好的影响.免耕留茬秸秆覆盖与传统土壤耕作比较,0～20cm耕层土壤全盐、孔隙度、pH分别降低1.86g/kg、5.28%和0.32;团粒结构,自然含水量,土壤贮水量分别增加72.5g/kg、32.95g/kg和111.98m3/hm2;玉米产量、产值、利润分别增加1.95t/hm2、1600元/hm2和600元/hm2;增产率达21.56%;土壤有机质、全N、速效N、P、K和CEC亦随之增加.
Field experiments on desertified soil in the Hexi Corridor were carried out to compare soil building effects between Treatment Ⅰ （non-tillage ＋ leaving stubbles ＋ mulching with straws）, Treatment Ⅱ （non-tillage ＋ leaving stubbles） and Treatment Ⅲ （traditional farming produce）. Results showed that Treatment Ⅰ had the best soil building effect; reducing total salt, porosity and pH of the plow layer （0 - 20 cm） by 1.86 g/kg, 5.28 % and 0.32, respectively and increasing aggregate structure, natural moisture and moisture holding capacity of the soil by 72.5 g/kg, 32.95 g/kg and 111.98 m^3/hm^2, respectively and yield, output value and profit of the crop of corn by 1.95 t/hm^2 or 21.56 %, 1600 yuan/hm^2 and 600 yuan/hm^2, respectively. Besides, its soil organic matter, total N, readily available N, readily available P, readily available K and CEC all increased correspondingly.
出处
《土壤》
CAS
CSCD
北大核心
2005年第4期447-450,共4页
Soils
基金
河西学院重点科研项目(02-A2)资助。
关键词
免耕留茬
秸秆覆盖
荒漠化
改土培肥
Non-tillage and leaving stubbles, Mulching with straws, Desertification, Soil building
