籽瓜是我区各国营农场种植的大宗经济作物,黑瓜籽的产量如何,直接关系着外贸内销任务的完成。为了改善籽瓜品质,提高黑瓜籽产量,我们安排了不同浓度的磷酸二氢钾根外追施试验,设有0.2%,0.3%、0.4%,对照(清水)四种处理,共16个小区,4次重复,总面积2.26亩。试验地为平板土,土层薄,肥力低。土壤有机质含量 Watermelon is a large cash crop planted in all state-run farms in our region. The output of black melon seeds is directly related to the completion of the task of domestic sales of foreign products. In order to improve the quality of seed and melon seeds and improve the yield of black melon seeds, we arranged different concentrations of potassium dihydrogenphosphate root top-dressing test with four treatments of 0.2%, 0.3%, 0.4% and control (fresh water) , 4 times repeated, a total area of ​​2.26 acres. Test for the flat soil, thin soil, low fertility. Soil organic matter content