“土壤封闭剂”在干旱风沙区观赏林木上的应用效果研究

Application of Soil Sealant on Planting Ornamental Tree in Sandy Area

为了研究瑞士"土壤封闭剂(Guilspar)"(简称G土壤封闭剂)保持土壤水分及其对观赏林木生长状况的影响。在盐池风沙区选用具有生态林建设及园艺观赏价值的红花刺槐(robinia pseudoacacia var.decaisneana)为研究对象,在G土壤封闭剂浓度为4%的条件下,进行不同剂量喷施应用效果的试验研究。结果表明,G土壤封闭剂能够有效抑制土壤水分损失,增加土壤含水量,促进植物生长发育。且随着其喷施剂量的增加,其土壤含水量也随之增加,其中喷施量为12L/m2(C6)效果最好,比对照提高土壤含水量48%。但当增加到一定剂量,其保水效果有所下降,不利于植物生长。

In order to research the effect of Helvetic soil sealant （G soil sealant for short） on conserving soil water and improving the growth of ornamental forest tree, the benefits of using 4%G soil sealant with different spraying amounts were tested in sandy area, Yanchi county, chosen robinia hosqida（robinia pseudoacacia vat. decaisneana） which have the ornamental and ecological value. The results indicted that G soil sealant can control soil water loss, increase soil water content and advance growth and development of the plants. The spraying amounts is more, the soil water content is higher. But, when it rise to somewhat, will had adverse effect. So, 12 L/m^2 （C6） is the best. Compared with CK, it increased soil water content with 48%.