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马尾松是本省分布面积最广、蓄积量最多的用材兼采脂树种。黔中各县(市)是马尾松实生苗造林的主要经营区。本区系贵州高原的主体,海拔1000—1400米。本区气候温暖湿润,年均温14.4—16.8℃,大于10℃,积温4300—4700℃。一月均温4.1—8℃,七月均温23.4—25.3℃。年降水量1184—1408毫米。海拔1300米以上的山地因气温较低,冬春常有雨凇危害,致使马尾松断梢而生长不良。本区山地出露岩石以各种砂岩、砂页岩、白云岩、石灰岩为主,低丘盆地间有厚层红色粘土分布。由于马尾松有适应性强、生长快、造林容易等特点,所以本区各国营及社队林场都把它作为当家树种经营。六十年代营造的马尾松矿柱林先后开始间伐利用。然而由于立地条件不同,在林木生长发育和生产力方面存在着明显差异。本区林业经济条件优越,有集约经营的要求,因而评定林分和立地质量等级已成为提高经营水平的重要问题。马尾松(人工)立地
Masson pine is the province’s most widely distributed, the largest volume of stock and take resinous species. The counties (cities) in Central Guizhou are the main management areas for afforestation of masson pine seedlings. The main body of Guizhou Plateau, elevation 1000-1400 meters. The climate warm and humid area, with an average annual temperature of 14.4-16.8 ℃, greater than 10 ℃, accumulated temperature 4300-4700 ℃. January average temperature 4.1-8 ℃, July average temperature 23.4-25.3 ℃. Annual precipitation 1184-1408 mm. Mountain above 1300 meters above sea level due to the lower temperature, winter and spring are often rain 凇 endangering, causing Pinus massoniana and poor growth. The rocks exposed in this area are dominated by various sandstones, sand shale, dolomite and limestone with thick red clay distributed in the lower hilly area. Due to the adaptability of Masson pine, rapid growth, afforestation and other characteristics, so the state camp and community teams and forestry around the area have it as a tree species management. Masson pine pillars created in the 1960s have begun to use thinning. However, due to different site conditions, there are obvious differences in tree growth and productivity. The superior forestry economy in this area has the requirement of intensive management. Therefore, the assessment of forest stand quality and site quality has become an important issue for improving the management level. Masson pine (artificial) site