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1976/1977年冬,我们在湖南省塑料研究所的大力支援和帮助下,引进了聚氯乙烯有色农用薄膜(压延,厚度0.07毫米左右),在国营东风农场进行橡胶林地和苗圃地的防寒试验。 林地防寒试验,在东风农场二分场机务队,1964年定植的RRIM600林地进行。试验地处于大勐笼山间盆地的一级阶地的平台地上,海拔575米。试验布置在成片林地的南部。 苗圃地防寒试验,在东风农场九分场二队,1976年10月6日移芽的当年橡胶苗圃地上进行。试验地处于九分场场部冷湖西北坡上的中部偏上的坡地上,海拔740米。试验布置在成片苗圃地的中部,处于冷湖湖面之上。
In the winter of 1976/77, with the strong support and assistance from Hunan Institute of Plastics, we introduced PVC colored agricultural film (rolled to a thickness of about 0.07 mm) and conducted cold-proof tests on rubberwood fields and nurseries at the state-owned Dongfeng Farm . Woodland cold-proof test was conducted at the Dongfeng Farm for the second-team field crew and the RRIM600 forest land planted in 1964. The experiment is located in the terrace of the first terrace of the Great Meng cage mountain basin, 575 meters above sea level. The experiment is arranged in the southern part of the forest. Nursery ground cold test, two teams in the Dongfeng farm nine points, October 6, 1976 budding the year of rubber nursery on the ground. The experiment is in the middle of the northwest slope of the cold field in Jiuliuchang field, with an altitude of 740 meters. The experiment is arranged in the middle of a piece of nursery, above the lake of cold lake.