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吉林省梨树县石岭国营林场,在59年春营造的落叶松速生丰产试验林内,除了进行丰产措施外,又进行了生长刺激的试验。现就其中效果特别显著的赤霉素注入皮层促进幼树生长的试验经过及初步效果介绍如下:营造丰产林的丰产措施:苗龄为2年和4年生两种。在造林前以人工实行了带状翻地,带深1米,宽50厘米,分三层施肥(亩施大粪约5千市斤)。造林后中耕除草6次,灌水5次。林地土壤为壤土。
Shilin State Forest Farm in Lishu County, Jilin Province, in the spring of 59 years to create Larch fast-growing test forest, in addition to high yield measures, but also conducted a growth stimulus test. Now on the effect of GA3 into the cortex to promote the growth of young trees and the initial test results are as follows: To create a high yield of high yield measures: two years old and 4-year-old two. In the afforestation before the implementation of a strip of land, with a depth of 1 meter, width 50 cm, divided into three layers of fertilization (mu Shi dung about 5 thousand jin). After afforestation weed 6 times, irrigation 5 times. Forest soil is loamy soil.