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我场从1974年开始引种湿地松和火炬松,目前已营造湿地松13,392亩,火炬松2,876亩。为了了解它们与本地马尾松的生长差异,我们于1979年对湿地松和火炬松与本地马尾松进行了苗期生长比较试验。现将试验情况介绍如下。一、试验地自然概况试验地设于本场大布工区苗圃,位于北纬26°16ˊ,东经115°26ˊ,海拔200米左右;年平均气温18.9℃,最高气温39.4℃,最低气温-5.2℃,平均温度≥10℃的活动积温为5,396℃;年平均无霜期284天;年平均太阳辐射总量为112千卡/厘米~2,全年日照达1,929.3
My field began to introduce slash pine and loblolly pine since 1974. Currently, there are 13,392 acres of slash pine and 2,876 acres of loblolly pine. In order to understand their differences in growth from native Pinus massoniana, we conducted a comparative experiment on the growth of Pinus elliottii and Pinus taeda with local Pinus massoniana in 1979. Now test the situation described below. First, the experimental nature of the test site is located in the field Dabu Gong Nursery, located at latitude 26 ° 16’, longitude 115 ° 26’, elevation of 200 meters; annual average temperature of 18.9 ℃, the highest temperature of 39.4 ℃, the lowest temperature of -5.2 ℃, The active accumulated temperature of the average temperature ≥10 ℃ is 5,396 ℃; the annual average frost-free period is 284 days; the annual average amount of solar radiation is 112 kcal / cm ~ 2, the annual sunshine reaches 1,929.3