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在陕北黄土丘陵沟壑区以不施PAM、保水剂为对照,分期监测了施用PAM和BJ2101-L、沃特保水剂对坡地苹果园0~300 cm土层土壤水分及苹果树体生长的影响。结果表明,在干旱期PAM和BJ2101-L、沃特保水剂对土壤水分无显著影响;在雨季0~50 cm土层土壤水分则分别提高了10.11%、6.38%和5.24%;雨季末期提高了9.69%、16.70%和5.91%;翌年春季提高了11.97%、13.96%和7.62%。PAM和保水剂主要影响坡地果园0~50 cm土层土壤水分,对50 cm以下土层土壤水分基本无影响。施用PAM和BJ2101-L、沃特保水剂苹果产量分别提高了14.47%、16.61%和12.99%。黄土丘陵沟壑区坡地果园应在雨季前或土壤水分含量较高时施用PAM和保水剂。
In the loess hilly and gully regions of northern Shaanxi, PAM and water-retaining agent were used as control to monitor the effects of PAM and BJ2101-L, water-retaining agent on the soil water content and apple tree growth in 0-300 cm soil layer in sloping land of apple orchard . The results showed that during the drought period PAM and BJ2101-L, water retaining agent had no significant effect on soil moisture, soil moisture in the 0 ~ 50 cm soil layer increased by 10.11%, 6.38% and 5.24% 9.69%, 16.70% and 5.91% respectively; the spring of next year increased by 11.97%, 13.96% and 7.62%. PAM and water-retaining agent mainly affect soil moisture in 0-50 cm soil layer in orchard, but have no effect on soil moisture in soil layer below 50 cm. Application of PAM and BJ2101-L, Watt super absorbent apple production increased by 14.47%, 16.61% and 12.99%. Loess Hill gully area of slope orchard should be before the rainy season or soil moisture content higher PAM and water retention agent.