Studies On Different Concentration Hydrogel And Coupling With Foreign Substances

In arid and semi-arid areas, the development of forestry can only rely on natural rainfall, water is the key factor of affecting the survival rate of afforestation and forest Growth restrictions.According to such a low survival rate of afforestation areas and inadequate supply of water in arid and semi-arid areas,the paper studied the growth of seedling and the Improvement of soil conditions in different treatment through using different concentrations of Hydrogel and other things in embedding and bubbling root,it provide a theoretical basis in using Hydrogel and foreign substances to improve water use efficiency of trees, the survival rate and preservation rate, thereby improving the construction plantations In such areas.This paper discussed the application Hydrogel and foreign substances of promoting the growth of seedlings through Planting the locust and walnut seedlings to observing two different ways of handling the growth of saplings, physiological and physical and chemical properties of soil and other indicators on May to September in 2007.The results show that After the source material with seedling growth better than the untreated control seedling. In field tests in reforestation, locust and walnut growth better in the height in A1(Hydrogel/0.1‰+ IBA/30ppm+ NAA/30ppm+ GA/30ppm+RE/20mg/l) and A2(Hydrogel/0.5‰+ IBA/50ppm+ NAA/50ppm+ GA/50ppm+RE/50mg/l),and growth better in the diameter in A3(Hydrogel /1.5‰+ IBA/80ppm+ NAA/80ppm+ GA/80ppm+RE/80mg/l)and A2(Hydrogel/0.5‰+ IBA/50ppm+ NAA/50ppm+ GA/50ppm+RE/50mg/l).In Greenhouse simulation test, locust and walnut growth better in the height in B3(Hydrogel/15g+Fulvic Acid/1.5g+Urea/1.2g+DAP/0.9g+SSP/0.6g+ Potassium Sulphate /0.6g+RE/1.5g ),C3 ( Hydrogel/7.5g+ Fulvic Acid/1.5g+ NAA/0.4g+ IAA/0.15g+ IBA/0.3g+RE/0.6g+GA/0.3g)and B4,C3,and growth better in the diameter in B4,C3 and B4,C3. Leaf area is growthing better in B4 and C3 of two Seedlings.It demonstrated that using application of appropriate Hydrogel and foreign substances can effectively promote the growth of seedlings.As using Hydrogel and foreign substances,it changed the soil of the water supply, making seedlings photosynthesis and leaf water potential on the curve relatively relaxed, thereby it improved the efficiency of water use and water productivity. Locust and Walnut had transpiration rate higher and stomatal resistance smaller in B4,C4 and B4,C3. Water consumption of the seedlings in growing season is relatively high in B4 and C3 with the two ways. the seedling with Application of Hydrogel and foreign substances survive longer than the contrast seedlings. Seedlings in B4 and C3 survived to 39 days and 42 days.Hydrogel and foreign substances affect little the soil PH value,it not to fundamentally change the soil salinization of the soil,and can significantly increase the total N content and soil organic matter content. Soil water makes the most reasonable way in B3,B4 and C3.