稀疏马尾松林混交红椎后的小气候特点

Microclimatic Characteristics in the Sparse Stand of Pinus massoniana Mixed with Castanopsis hystrix

根据混交林在抗病虫害、改善气候、促进林木生长方面的作用原理，适地适树混交其它树种，能提高林木根系的吸收能力［１］和林分生产力，增强林分的抗逆性［２］。研究稀疏林分及其改造后的小气候变化，对指导林业生产活动具有重要意义。１试验区自然概况广西凭祥市中国林...

In the hottest August,routine meteorological study method was used to observe the microclimatic changes in the sparse stand of Pinus massoniana mixed with Castanopsis hystrix ,sparse pure stand of P.massoniana and the vacant space in the stand.The observation showed that the microclimate in the mixed stand was the best,which was beneficial for the tree growth. In the above mentioned 3 plots,the intensity of illumination at the height of 150 cm was 666, 8 505 and 49 263 lx respectivly;ground temperature difference between day and night 4.6,13.7 and 33.9 ℃ respectively,soil surface temperature 26.6,30.2 and 41.8 ℃ respectively,relative humidity of air 70.4%,67.4% and 66.6% respectively;24 h evaporation amount at the height of 70 cm 1.78,2.88 and 5.96 mm respectively.