科尔沁西部碱化草甸草地改良配套技术试验研究  

An experimental study on improvement techniques for alkalized meadow grassland in the western Horqin Area

作　　者：蒋德明[1] 曹成有[2] 押田敏雄 李雪华[1] 李晓兰[1] 

机构地区：[1]中国科学院沈阳应用生态研究所,辽宁沈阳110016 [2]东北大学理学院,辽宁沈阳110004 [3]麻布大学

出　　处：《草业科学》2007年第3期12-16,共5页Pratacultural Science

基　　金：国家"十五"科技攻关项目"科尔沁沙地植被重建与调控技术研究与示范(2005BA517A08)

摘　　要：对科尔沁西部典型重度碱化草地进行了改良试验研究,采用的方法包括翻耙补播沙打旺Astragalus adsurgens、施N肥、施土壤改良剂(石膏)。经过3年改良试验,结果表明,这些技术的有机结合可以显著地提高碱化草甸草地牧草的产量和质量,土壤理化性质明显改善:翻耙补播沙打旺增加草地产量2.18-3.52倍;土壤容重、pH值、含盐量下降;土壤水分状况、孔隙度、有机C、全N、速效N、速效P等均明显增加;在翻耙补播的基础上施用(NH4)2SO475-225 kg/hm2和CaSO41 500-4 500 kg/hm2,牧草产量可分别提高4.5%-20.2%和17.4%-49.9%。The measures of plowing-harrowing soil, reseeding leguminous plant, fertilizing soil with （NH4）2SO4 and applied CaSO4 were adopted in this field study to improve alkalized grassland in Horqin area. Results of 3 years studies showed that the combination of these methods increased yield and quality of grass significantly, and ameliorated soil physicochemical properties following the improvement. Plowing-harrowing soil with reseeding Astragalus adsurgens increased grass yield by 2.18-3.52 fold compared with non-improved grassland. Soil bulk density, pH, salinity content decreased and soil moisture, total porosity, organic carbon, total N, available N, P increased. The grass yield was continuously increased by 4.5%-20.2% and 17.4%-49.9% with 75-225 kg/hm^2 （NH4）2SO4 and 1500-4 500 kg/hm^2 CaSO4 applied respectively following plowing-harrowing soil and reseeding leguminous plant.

关 键 词：碱化草地 改良技术 施肥 翻耙 

分 类 号：S54[农业科学—作物学]