落花落果是核桃产量低而不稳的重要原因之一。提高座果率即可显著地增加产量。为此,各地在试验中从增施肥水、合理修剪、防治病虫、改善授粉条件等方面探讨保花保果的途径,并已取得一定成果。抚宁县宋庄大队是该县核桃生产的重点大队之一,该队有40年生以上的盛果期核桃 Falling fruit is one of the important reasons for the low and unstable yield of walnut. Increasing fruit set yields can significantly increase yields. For this reason, we have explored the ways of preserving the fruits and preserving fruits in the experiments from the aspects of fertilizing water, pruning rationally, preventing and controlling pests and diseases, and improving pollination conditions. Some achievements have been made. Funing County Songzhuang brigade is the county’s key production unit of walnuts one of the team has a 40-year-old Sheng fruit walnut