梨树授粉新法──喷雾授粉法北方的一些老龄梨园．由于配置授粉树不足，或授粉材虽不缺乏，但花期受到外界环境条件的不良影响，影响昆虫传粉，常造成花而不实。为了提高座果率，人工辅助授粉起着不可忽视的作用。一般可提高座果率的７７－８０％。为了提高人工授粉效率，... Pear pollination new law ─ ─ spray pollination North of some of the elderly pear orchard. Due to inadequate allocation of pollination trees, or although the lack of pollination material, but the flowering by the adverse environmental conditions adversely affect the insect pollination, often resulting in flowers but not real. In order to improve the fruit set rate, artificial pollination plays a non-negligible role. Generally increase the rate of fruit set 77-80%. In order to improve artificial pollination efficiency, ...