桃树是自花授粉结实的果树,桃花为自花结实的虫媒花。露地栽培,一般不需要进行人工辅助授粉便可达到理想的坐果率,获得较高的产量。但在密闭的棚室内则不同。其原因:一是棚室内昆虫少,缺乏传粉媒介;二是棚室内空气湿度大,花粉粘滞,扩散困难,生活力低;三是有些品种本身就无花粉或少花粉(如安农水蜜、砂子早生等) Peach trees are self-pollinating fruit trees, peach flowers self-infested insect flower. Open-field cultivation, generally do not need artificial auxiliary pollination can achieve the ideal rate of fruit set, access to higher yields. But in a closed shed room is different. The reason is: First, shed insects less, the lack of pollinators; Second, shed indoor air humidity, pollen viscosity, diffusion difficulties, low viability; Third, some varieties of their own pollen or less pollen (such as Annong honey, Early sand etc.)