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地膜覆盖栽培番茄全生育期的干物质积累与养分吸收呈S形曲线变化,可分为始、盛、末期三个阶段。始期和末期阶段,干物质积累与养分吸收速度较慢,盛期呈直线增加趋势。覆膜条件下干物质迅速积累与养分旺盛吸收的区间大于未覆膜处理。定植初期干物质向根、茎、叶的分配和生育中后期向果实的分配均以覆膜处理为大。地膜覆盖栽培使番茄生育前期营养器官生长加快,这就为生育中后期营养物质向果实的分配奠定了基础。
The dry matter accumulation and nutrient absorption during the whole growth period of plastic film-mulching tomato cultivars showed a S-shaped curve, which could be divided into three stages of beginning, end and end. At the beginning and end of the period, dry matter accumulation and nutrient uptake were slower, with a steep increase in the peak. Under the condition of film mulching, the rapid accumulation of dry matter and the absorption of nutrients were longer than those of uncoated ones. The initial allocation of dry matter to the roots, stems and leaves of the distribution and growth of mid-late to the distribution of fruits are treated with plastic film is large. Mulch mulching accelerated the growth of vegetative organs at the early stage of tomato growth, which lays the foundation for the distribution of nutrients to fruits in the middle and late growth period.