保护地黄瓜养分积累特点及氮钾营养对其生长的影响

Studies on Characteristics of Nutritive Absorption and N, K Nutrition on Plant Growh of Cucumber in Sheltered Ground

保护地条件下黄瓜对养分的吸收量是K＞N＞Ca＞Mg＞P。养分最大吸收量出现在盛瓜期。各种矿质元素在不同器官的分配有所不同，根为K＞N＞Ca＞P＞Mg，茎为K＞Ca＞N＞Mg＞P，叶为Ca＞N＞K＞Mg＞P，瓜为K＞N＞Ca＞Mg＞P。氮钾合理配合能提高黄瓜产量、光合作用、品质及抗病能力。

Under sheltered ground condition,the amount of nutrient absorbed by cucumber were considerable different in the order of K>N>Ca>Mg>P. The period of fruit-production was most important in plant nutrition. The distribution of nutrient elements was different in different positions. The reasonable combination of N and K can improve yield,quality, photosynthesis and disease resistance. It was suggested that optimum amounts of N and K are 28kg and 36kg per mu respectively. The cucumber yield of first collection period depended on soil fertility level. The fertilizer application affected the yield of middle and last collection period.