闻名全国的开封西瓜,除了有利的土壤、气候条件外,与传统的施肥技术有关。民间流传着“大粪甜、饼肥沙、草粪西瓜瓤味差”的农谚。近几年来,随着西瓜种值面积的扩大,大粪和饼肥已远远不能满足生产的需要。因此,不少瓜农盲目大量施用氮素化肥,结果导致土壤养分比例失调,西瓜瓤质变硬、酸度增加,糖分降低,品质急剧下降。为此,从1982年开始了西瓜施用氮磷钾化肥配合比例试验,其试验效果明显,现介绍如下。 Known around the country, watermelon Kaifeng, in addition to favorable soil and climatic conditions, with the traditional fertilization technology. Folk circulated with “dung sweet, cake fat, grass dung watermelon smell bad” farming proverbs. In recent years, with the expansion of watermelon species area, dung and cake fertilizer is far from meeting production needs. Therefore, many farmers blindly apply large amounts of nitrogen fertilizer blindly, resulting in the imbalance of soil nutrients, watermelon hardened, acidity increased, lower sugar, a sharp decline in quality. To this end, since 1982, watermelon application of NPK fertilizers with the proportion of test, the test results were obvious, are described below.