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一、材料与方法试验园和苗圃设在阿克苏地区实验林场实验站。该地区海拔1200米,年平均气温9.5℃,无霜期187天,最长时达220(天),年降水量44.6～60.8毫米,土质为沙壤土。以当年的实生苗和幼龄核桃树为试材,株行距为6×8米,苗圃株行距为10×40厘米,对当年的实生苗和栽植后1～3年生的幼树分别用凡士林涂枝干、埋土和涂白试验。供试凡士林为南京金陵化工总公司化工一厂生产,涂白剂自配,其成份为食盐0.1份,面粉0.2份,生石灰1份,水10份。1.对当年的实生苗的处理 (1)凡士林涂干12月中旬气温较高的中午,将凡士林刮入铁溶器内,每千克凡士林加水150～200毫升,置于火上充分溶化后,用手徐整株一层;(2)弯倒埋土,弯倒在行距间埋土,春天一次出土;(3)对照(不做任何处理)。从1998～2000年春苗木发芽后,调查各处理的抽条率。
First, materials and methods Experimental Park and nursery located in the Aksu Experimental Forest Farm Experimental Station. The area is 1,200 meters above sea level with an annual average temperature of 9.5 ℃, frost-free period of 187 days and the longest time of 220 days. The annual rainfall is 44.6-60.8 mm, and the soil is sandy loam. The current year seedlings and young walnut trees as the test material, the line spacing of 6 × 8 m, nursery plant spacing of 10 × 40 cm, the current year seedlings and planting 1-3 years old saplings were respectively Vaseline Branch, buried and painted white test. For test Vaseline Nanjing Chemical Industry Company Jinling Chemical Plant production, white agent self-allocation, the ingredients of 0.1 parts of salt, flour 0.2 parts, lime 1, water 10 copies. 1. Treatment of the current year’s seedlings (1) Vaseline Tugan midday in mid-December at noon, the vaseline scraping iron within the iron solvent per kilogram of petrolatum 150 to 200 ml, placed on the fire fully melted, The whole layer of hand Xu Xu; (2) fall buried, bending down buried in row spacing spring unearthed; (3) control (without any treatment). From the spring of 1998 to the spring of 2000 after sprouting seedlings, the rate of stripping of each treatment was investigated.