Daily variation regularity of soil moisture of Camellia oleifera forest land under different water-retention treatments
In order to scientific management of Camellia oleifera forest, taking space between lines of C. oleifera as control, effects of different water-retention treatments on various layers of soil moisture of 6-year-old C. oleifera forest were observed and analyzed, including covering plastic film and straw, covering plastic film, covering straw and loosening. The results showed that water consumption in C. oleifera was obviously greater than dwarf weed, so using water conservation had- important significance. The four different water-retention treatments could improve soil moisture in different soil lays at various degrees. In sunny summer, the order of effect of water-retention from high to low was covering straw, covering plastic film and straw, loosening, covering plastic film at 9:00-10:00, and moisture content in 10-20 cm soil lay was the highest by covering plastic film and straw measure. At 13:00-14:00, covering straw had water-retention effect on 0-30 cm soil lay, covering plastic film and straw also had better water-retention effect on 10-30 cm soil lay, but loosening had the best effect on deeper soil lay. At 16:00-17:00, water content was higher by covering straw measure in 0-10 cm soil lay, covering plastic film and straw measure had higher water content in 10-30 cm soil lay, covering straw and loosening measures had higher water content in 30-40 cm soil lay. Based on C. oleifera root system distribution status and soil moisture dynamic change at every periods, covering straw and covering plastic film and straw measures were considered as relatively good water-retention measures in all of the four treatments, and covering straw was the most economic and environmental protection water-retention treatments.
NETL
NSTL
万方数据
维普
