摘要
高寒地区饲用芜菁(莞根)采用厚度为0.006mm的塑料薄膜覆盖后,在5～9月144d的生长期内,土壤0～25cm耕层≥0℃地积温增加753.5℃,平均每日增加5.2℃,0～30cm土壤湿度增加3.56%,土壤有机质、全氮、速效氮和全磷分别增加0.18%、0.03%、0.04%和0.007%。覆膜同时抑制了杂草的滋生,为芜菁生长提供了有利的生境条件,是芜菁获得高产的主要原因。与此同时,覆膜也降低了芜菁微环境中大气的CO2浓度,叶室和叶片温度,改变了光合有效辐射。
Through plastic mulching( 0 .0 0 6mm) cultivation in apline area during1 4 4days of growth period from May to September,the soil ≥ 0℃ accumulative temperature of soil within 0～ 2 5 cm was increased to 75 3 .5 ( average 5 .2℃ /d) ,0～ 3 0 cm soil humidity raise 3 . 5 6%,soil organic matter substance,total nitrogen,available nitrogen and total phosphorus increased by 0 .1 8%,0 .0 3 %,0 .0 4 %and 0 .0 0 7%respectively. Meanwhile the weed were inhibited effectively,all of which provided a better condition for turnip to grow up and gained higher yield.In addition,plastic mulching cultivation reduced the CO2 density,air humidity,air and leaves temperature and photosynthesis effective radiation.
出处
《草业科学》
CAS
CSCD
北大核心
2000年第1期9-12,共4页
Pratacultural Science
基金
甘肃省科委"九五"重点项目
关键词
高寒地区
芜菁
覆膜栽培
微环境
饲料作物
alpine area
turnip
plastic mulching cultivation
micro- environment
