Impact of the Amount of Fertilizationon Yield and Water-fertilizer Use Efficiency of Tomato Grown in a Solar Greenhouse under Drip Fertigation
JIA Songnan
FAN Fengcui
LIU Shengyao
LI Zhihong
ZHAO Nan
DU Fenghuan
ZHANG Zhe
WANG Helei
JIA Jianming
QIN Yong
Abstract：By keeping the ratios of N,P (P2O5) and K(K2O) at6％,5％ and 19％ respectively,we investigated the impact of four fertilizations:high fertilization (F1),medium fertilization (F2),low fertilization (F3) and zero fertilization (F4),on the yield and water-fertilizer use efficiency of tomato grown in a solar greenhouse under drip fertigation.The results showed that the yield and water use efficiency (WUE) increased parabolically with the amount of fertilization before peaking at 67 776.93 kg/hm2 and 49.27 kg/m3 respectively when the N application was 290.2 kg/hm2,indicating that an appropriate fertilization increased the yield and WUE.The partial productivity (PFP) of fertilization decreases exponentially with the amount of fertilizer in the range of 41.4～539.9 kg/hm2 of N application.Dry-matter accumulation under different fertilizations was ranked in F2 ＞ F 1 ＞ F3 ＞ F4,and the increase of dry matter with time can be described by the logistic function.The accumulating rate of dry matters peaked earlier in F2 than in other treatments,and lasted 1 ～ 8 days longer than in other treatments.Approximately,1.97％～6.96％ of the dry matter was translocated to fruit.The results showed that more than 90％ of all dry matter was due to the photosynthesis at the late stage.It is hence essential to increase water and fertilizer supply during the fruit-growing stage.
Keywords：solar greenhousedrip fertigationtomatofertilizerslogistic functiondry matter
Publication Date：2017-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 21-29 )