一般认为,杉木黄化病是一种生理性病害.它是恩施地区比较常见的杉木病害,除海拔120-800米低山区外,二高山(海拔800-1200米)以上地区均有发生,成为我区杉木生产极待解决的问题.什么是高山区杉木黄化病的主要原因?根据长期实地观察,我们认为主要原因是土壤过湿,而土壤湿度又和地形及气候特点有密切关系.恩施地区位于大巴山南和武陵山北,特别是海拔1200米以上高山区,雨量丰富,气温较低,蒸发量小,空气湿度大,成 It is generally believed that Chinese fir is a physiological disease, which is a common disease of Chinese fir in Enshi, except for the low mountainous area of ​​120-800 meters above sea level, and the area of ​​the second high mountain (above 800-1200 meters above sea level) What is the main reason for the yellowing disease of Chinese fir? In the long-term field observation, we think the main reason is that the soil is too wet, and the soil moisture is closely related to the terrain and climate characteristics. Dabashan area is located in the south and Wuling Mountain, especially at an altitude of 1200 meters above the mountainous area, abundant rainfall, low temperature, evaporation, air humidity, into