基于DGPS技术的水稻喷雾雾滴分布的研究

用Rhodamine-B染料与水配成1g／L的示踪溶液代替农药在水稻田喷雾，借助于荧光分光光度计计算雾滴在水稻某一区域的沉积量．结果表明：在按距离地面40cm以上和20～40、5～20cm对水稻分层时，雾滴沉积分布与各层水稻植株干物质质量成正比，在水稻植株采样质量分别为首层7．325～147．770g、中层8．767～287．933g、底层13．630～571．348g时，获得的雾滴沉积与对应的水稻植株干物质质量的比例系数分别为0．187、0．066、0．016．利用DGPS技术和GIS软件绘制出了试验稻田的雾滴沉积分布总图及不同层间的雾滴沉积分布图．

The Deposit Distribution of Spraying Droplet Based on DGPS in Rice Fields

A tracer solution of Rhodamine-B mixed with water in 1 g/L concentration was sprayed in rice fields in place of pesticide. The deposit of spraying droplet in a certain area was surveyed with a fluorescence spectrophotometer. Results showed that when the rice plant was bedded in three layers of above 40 cm, 20-40 and 5-20 cm over the ground, the spraying droplet deposit was in direct proportion to the mass of dried rice plant. When the top layer mass of dried rice plant was 7. 325-147. 770 g, the mid layer mass was 8. 767-287.933 g, the bottom layer mass was 13. 630-571. 348 g, the proportional factors of droplet deposit to rice plant mass were 0. 187, 0. 066 and 0. 016 respectively. With the technology of DGPS, the maps of droplet deposit distribution both of total spraying and in different layers were plotted.