滨海风沙地果园防护林农业气象生态与农业技术研究

滨海风沙地防护林气象效应良好,林内相对湿度、雨量都比林外高,蒸发量降低,风速减弱.防护林具有"保温性"和"保冷性"的作用.风沙地夏秋季节土温高、持续时间久、温差变幅大,采取绿肥覆盖能有效降低地温.滨海风沙地土壤含水量变幅大,切勿选择地下水位过高或过低处建园.滨海风沙地气候逐年变暖,冬季"温室效应"明显.根据滨海风沙地防护林的气象效应,提出了适应滨海风沙地的农业技术措施.

Studies on Agricultural Meteorology Ecosystem and Agricultural Technique in Orchard Shelter Forest of Coastal Sandy Soil

The meteorology effects of the shelter forest in the coastal sandy soil are well.The good effects include: the relative humidity and rain fall are higher than that of out-forest,whereas the evaporation rate and the wind speed are lower than that of out-forest.The shelter forest possesses the function of heat and cold preservation.The coastal soil has higher soil temperature,longer duration and greater difference of temperature during day and night in summer and autumn.Planting the green manure can decrease the soil temperature effectively.Don't select the places,which have too high or too low water level,for setting up the orchards.The temperature of coastal sandy soil increases year after year,and its greenhouse effect in winter is apparent.According to these,the corresponding agricultural techniques are required.