东圳库区生态枇杷园生产模式探讨

Discussion on the Pattern of Ecological Loquat Orchard Construction in Dongzhen Reservoir

试验证明果园生草制是我国山区果园土壤管理的一个行之有效的模式。枇杷园进行生草覆盖的生态控制区与化学防治区相比,土壤养分明显提高,土壤有机质、全N、速效N、有效P、速效K、pH含量分别提高了4.26%、18.29%、35.92%、31.62%、20.06%和15.55%。生草覆盖同时改善了枇杷园小气候环境,增加了天敌种群数量,生态控制区蜘蛛类天敌平均7.0头/株,高于化学防治区2.18头/株,和进行清耕的综合防治区5.1头/株,天敌赤眼蜂在稻田和枇杷园间存在明显的迁移运动,为害虫的生态控制奠定基础。

Grass cover system is an effective measure for orchard management of the mountainous region orchard. Comporned with the cherical control orrea the ecological cotr5ol crren of loguat orchond＇s grass cover, whose soil nutrient was improved obviously. Organic matter, total nitrogen, pH were increased by 4. 26% ,18.29% ,35.92% ,31, 62% ,20. 06% and 15, 55%. The small climate environment was improved and the amount of natural enemies were increased by the measure of grass cover, The amount of spiders was increased in the ecological control area than in the chemical control and integrated pest control areas, And Trichogramma spp. migrated from the rice fields to the orchard obviously. An ecological control pests system was established by means of grass cover system.