施肥对温室基质栽培甜瓜各器官养分吸收及分配的影响

研究了不同化肥施用量对有机基质型无土栽培甜瓜各器官N、P和K养分浓度、养分分配率和单位果实产量养分吸收量的影响。结果表明：施肥量对各器官养分分配有重要影响。营养器官(根、茎、叶)中N、P和K的分配率随化肥施用量增多而升高,且处理闻差异显著,但果实中养分分配率与产量相关；形成单位产量甜瓜果实,植株从基质中吸收N、P和K养分量随施肥量增大而增大,且处理间差异显著；追肥可促进甜瓜营养器官对养分的吸收,但过量追肥却影响果实对养分的吸收,所以生产中应提倡科学配方施肥。

STUDY ON NUTRITION UTILIZATION RATES OF MUSKMELON IN ORGANIC SUBSTRATE CULTURE IN SOLAR GREENHOUSE

Muskmelon was used in this experiment to study the effect of different fertilization application on nutri- tion absorption and distribution.The results were as follows:Proper fertilizer application would promote absorption of the nutrition in vegetable organ.The more fertilizer applied,the more absorption of N,P,and K in the vegetable organ.The differences between treatments were significant.The absorption in the fruits was positively correlated to the yield.The utilization rate of the nutrition could be improved with proper fertilizer application.But if the fertil- izer is excessive,the utilization rate of the nutrition in substrates is descended.