The Study On Cutting Seedlings And Young Forest Growth Of Salix Maizhokung Garensis In The Middle Area Of Guangxi

Salix maizhokung garensis, a deciduous trees of Salix genus, Salicaceae family, which was rapid growth, strong adaptability, good material and was used for industrial raw material forest, big diameter wood cultivation, the ideal species of afforestation, papermaking, wide prospect of market.This study carried out cutting seedlins and young forest growth of Salix maizhokung garensis in the middle area of Guangxi, through the nursery seedling raising and afforestation of field, affecting the cutting seedlings of cutting selection tightly, promote root agent, illumination and afforestation of forest land, density, root water to study the related factors, explore the cutting seedlings and afforestation technology of Salix maizhokung garensis, promote the cultivation for the tree species to provide technical guidance the middle area of Guangxi. The results of the study were as follows:1,The cutting seedlings research of Salix maizhokung garensisCutting time was better to 3,4 months, cut the strong and 1-2 years Salix maizhokung garensis west into 10 to 15 cm length, incision on flat under oblique cutting, cutting with 1000 times of 50% carbendazol aqueous solution soak for 10 min, put the cutting base 3cm at about 200 ppm ABT1 abt in aqueous solution for 20 min after cutting the seedbed, the row spacing was 10 cm by 10 cm, cutting depth was about 1/3-1/2 of cutting length, dissolve into 1% aqueous solution spray processing after 30 days, two months later open shade nets, spraying again 1% compound fertilizer aqueous solution. When twig 10-20 cm, keep a growth of a piece of the best branches, cuttage seedling can sizes of 3 months.2,young forest gowth research of Salix maizhokung garensis(1) In the low hills of middle area of Guangxi, for afforestation by 2 years Salix maizhokung garensis in June.the survival rate was 51.8% after reforestation 1 year, the mortality rate was as high as 48.2%, seedling height was 100.6 cm, afforestation effect was not ideal.The hydrothermal condition overall was good in Guizhong region, but the drought, the rainy season, water heat distribution, mainly concentrated in June to August, afforestation in March to May in advance, could be avoid the heat after June.(2)afforestation survival rate was not high, the stand was not yet closed, the survival rate of different planting density of Salix maizhokung garensis and smoke tip rates had no obvious regularity, survival rate under different planting density and suction tip rate had not show difference. So it still need to continue observation late.(3) forestation survival from downhill to hill, the survival rate was highest in downhill after 1 year, which wans 51.1%; Seedling height in 94.3 to 100.6 cm, with obvious growth; diameter growth growth was not obvious which between 0.8 to 0.9 cm. Different slope positions Salix maizhokung garensis afforestation survival rate were not ideal, altitude, slope choice has important influence on Salix maizhokung garensis afforestation.(4) survival rate and the average high of cutting seedling were higher than in the west, afforestation effect was better than that of the west.(5) treatment effect of cutting seedling in dip in mud+ABT ABT1 200 ppm was best, and the average survival rate were 60.3% and 108.2 cm high. Before afforestation seedling for water treatment effects were better than CK blank check. (6) Stem rot was exist in root growth of Salix maizhokung garensis, the root was bitten serious by termites; some peats such as Plagiodera versicolora、Gypsonoma minutara Hubner bite the leaves,According to the etiology, physical and chemical methods for the combination of prevention and control.