摘要
果园生草起到了平稳地温的作用。在寒冷季节,可提高冠下气温0.2—0.5℃,提高叶温0.2—1.0℃,提高地表温度2—3℃,提高根际土温1—2℃;在炎热季节,可降低气温0.5—0.8℃,降低叶温0.4—1.7℃,降低地表温度最高达10.7℃,降低根际土温2.5℃,果园生草可延长光合作用时间,提高光合速率,在草旺盛生长的夏季,使土壤湿度降低,这有利于滤掉土壤中过多的水分,促进根系的生长和吸收。
Sown grass mulch could moderate and minimize the daily fluctuation of temperature; It increased air temperature (T_a)under canopy 0.2-0.5℃, leaf temperature (T_1) 0.2-1.0℃, temperature of surface soil (T_s) 2-3℃ and soil temperature in rhizosphere (T_r)1-2℃ in cool seasons, declined T_a 0.5-0.8℃, T_l 0.4-1.7℃, T_s 5.2-10.7℃, T_r 1.0-2.5℃ respectively in warm seasons. It also lenghthened photosynthetic hours, increased P_n, and significantly decreased soil moisture when grass grew vigorous in high temperature seasons. It was helpful to filter surplus water in the soil.
出处
《福建农业大学学报》
CSCD
1996年第1期24-28,共5页
Journal of Fujian Agricultural University
关键词
果园生草
龙眼
气候
光合速率
Sown grass mulch
longan
orchard microclimate
photosynthetic rate
