SUBSTANTIATION OF COMPLEX FOR GROWING TRANSPLANT SEEDLINGS WITH PROTECTIVE SOIL-ROOT STRUCTURES

Abstract

There is considered a possibility to obtain transplant seedlings with protective soil-root structures in ground greenhouses not equipped with bridge systems. There were established limit parameters of the protective zone for such operations on forming soil-root structures of transplants as cutting the root system in horizontal plane, and slotting it in vertical plane. The complex developed allows us to use technological capabilities of bridge systems while growing transplants with protective soil-root structures on the principally new base (without rigid guide track). It has been established that operations on forming protective soil-root structures while growing transplants under conditions of size-limited protective zone round the root system provide higher dynamics of plant development. The rate of root weight gain in the experimental variants reached 0.57-0.86 g/day (0.20 g/day in the control), the rate of stem-and-leaf apparatus up to 1.95-2.8652 g/day (1.15 g/day in the control). It is shown that 3 cm decrease in size of the protective zone does not significantly influence root weight gains that has allowed us to build allowance for source requirements to developing mobile complex. With that, transplants are formed more compact in volume and shape that is important for mechanized planting.