大棚番茄养分吸收及其分布规律的研究

NUTRIENT UPTAKE AND DISTRIBUTION IN TOMATO CULTIVAR UNDER PLASTICATE SHED

番茄对氮、磷、钾和钙、镁营养元素的吸收贯穿于整个生育时期。其体内的累积量,全生长期以钾为最多,其趋势是K>N>Ca>P、Mg;主要营养元素的吸收容量,在全生育期有两个高峰,即盛花期和盛果—果膨大期;但各元素的吸收强度以盛果—果膨大期较小,此期为营养最大效率期;营养元素在番茄体内的分布比例,在果实膨大期前是叶>茎>根,进入膨大期后,吸收的N、P、K转移果实中,其分布是果>叶>茎>根,而Ca、Mg的分布是叶>果>茎>根。

Uptake of nutrient N. P. K and Ca. Mg, is fundemental to the growth of tomato, The tomato plants uptake and maintain different nutrient elements at different levels (K>N>Ca>P. Mg). Major nutrient elements show a double peak profile of uptaking, namely flower heavy-blowing and heavy fruit to fruit larging period. The absorption tensity of each element is weak in heavy fruit to fruit larging period. the most efficient period of nutrient utilization. The mode of nutrient elements distribution in tomato is leaf>stem>root before fruit larging. During fruit larging period. however, that of N, P, K is fruit>stem>root. and that of Ca, Mg is leaf>fruit>stem>root.