大棚番茄整枝与养分吸收分配关系的研究

试验整枝配合施肥,旨在探讨整枝与养分吸收分配的关系,为番茄整枝增产提供理论依据。试验在大棚内进行,设3种整枝方式即单干整枝、连续摘心整枝及老株再生整枝。结果表明,3种整枝方式下番茄N,P,K积累量随生长发育而增加,且全生育期K量>积N量>。到株龄218d,单株N,P,K积累单干整枝为643g,253g,660g;连续摘心整枝为676g,255g,684g;老株再生整枝为664g,271g,724g。追肥促进N,P,K的积累,追肥次数越多积累量越大。3种整枝方式均表现为两次吸肥高峰期分别为生育前期和采收盛期之前,追肥使第2次吸收高峰期提前到来。对于连续摘心整枝采收盛期以前追肥明显增产,而后期追肥增产潜力不大;对于单干整枝和老株再生整枝追肥次数越多增产越大,尤其是老株再生整枝后期追肥对再生期的产量起决定作用。

A STUDY ON THE RELATIONSHIPS BETWEEN TRAINING METHODS AND NUTRITION ABSORBTION IN PLASTIC GREENHOUSE TOMATOES

The experument was carried out to study the relationships between training methods and yield formation and nutrition absorttion in tomatoes (lycopersicum esculentnm Mil) by treatment of training methods followed manuring, to provide theoritical basis for increasing production of training. The experiment was treated by three different methods of training:Single branch、Head-taking、Renewed growing. The results showed that: The quantity of N,P,K accumulation is increased with growth and development of tomatoes, and in whole duration, the quantity of nutritive accumulation shows K>N>P. Until 218 day-old seedling, the quantity of N,P,K accumulation of per plant of Single branch is 6 43 g (N)、2 53 g(P) 6 60 g(K), which of Head-trking is 6 67,2 55,6 84 g,which of Renewed growing is 6 64,2 71, 7 24 g。Manuring improves N,P,K accumulation and the more times of manuring is ,the greater quantity of accumulation is. There are two peaks of absorbing fertilizer of tomato plant that one occure in fore period of duration and another occure before full-picking time, manuring make the second peak period earlier. Manuring before full-picking time of Head-taking increase production markedly, and manuring in later period can,'t increase production. The production of the treatments of Single branch and Renewed growing is increased with times of manuring, especially for Renewed growing the latter manuring is a factor to decide the production of renewed growth period.$$$$