宁南山区防雹网内梨园生境状态研究

Effect of hail defend-net on living condition in pear orchard in south Ningxia

2007年实地观测固原上黄村1 500m^2设防雹网梨园土壤水分、空气、湿度等微生境条件变化程度,研究分析了防雹网对宁南山区梨园生境状况的影响。结果表明：梨园使用防雹网能改善果园小气候,提高梨园1 m高度空气相对湿度,其日变化符合y=ax2-bx＋c二次抛物线,晴天的曲线曲率高于阴天,梨园1 m高度温度有防雹网低于无防雹网;0-200 cm土壤剖面的水分含量有防雹网高于没有防雹网;同时,使用防雹网能够在白天降低土壤温度,夜间维持较高的土壤温度,缓解土壤温度的变化幅度,特别是表层温度变化更明显。

According to data of the observation to pear easily damaged by hail in semiarid area in south Ningxia,it was important to defend pear from hail damage in the growth period.The field experiment was conducted to study the air humidity,soil moisture and soil temperature change law in pear orchard with the hail defend-net.The results showed that both the air humidity in one-meter high air and the soil moisture at the profile depth of 0～200 cm were increased when suing the hail defend-net,while the soil temperature changes were small in day time with the hail defend-net,especially in surface soil.The hail defend-net application can adjust the pear growing condition in semiarid area in south Ningxia.