摘要
土壤结构改良剂——沥青乳剂具有覆盖物和改良剂的双重作用。在蒸发的三个阶段中,沥青乳剂具有抑制水分蒸发的效果,抑制率达14.71～32.31%。在0～15厘米和1米土层内,土壤含水量分别增加19.33～27.44%和10%左右。施用沥青乳剂后,在1天内或1年内土壤温度均高于对照,日平均增温2.1℃。当沥青乳剂用于砂土、壤土和粘土,其用量为每亩40、80和120公斤时,土壤团聚体可增加5.6～19.4%。由于沥青乳剂可以提高地温,晚播冬小麦比对照提前5天出苗,增产9.6%。
Soil conditioner—bitumen emulsion has the dual purposes of mulchingand amendment of soil.At the three evaporative stages,bitumen emulsionhas the effect of retraining soil moisture evaporation.The restraining ratereaches 14.71-32.31%.Water content within 0-15 cm and 1 meter soillayer was increased by 19.33-27.44% and 10% respectively.After bitumenemulsion was used within 24 hours per day or 12 monthes per year,soil tem-perature was higher than that in the control.The average increased tempera-ture per day was 2.1℃.When bitumen emulsion was used on sandy,loam andclay soil,the quantity of bitumen emulsion was 40,80,120 kg per mu,thesoil aggregates were increased by 5.6-19.4%.Because the bitumen emulsion canaffect soil temperature,the emergence of seedlings sown in the late time was5 days earlier than the Control.The yields were increased by 9.6%.
出处
《干旱地区农业研究》
CSCD
北大核心
1991年第2期48-55,共8页
Agricultural Research in the Arid Areas
关键词
土壤
结构
改良剂
覆盖
改土
soil structure improvment conditioner
bitumen emulsion
sprayjng application
moisture conservation
temperature increase
amendment of soil
