Abstract:

A composite model including crop leaf area index and water uptake was used to count tomato
plant daily water requirement quantity．Four different irrigation treatments were established（CK Experience
irrigation，W1 Equals simulation，W2 15% Lower than simulation，W3 25% Lower than simulation）to study
the effect of model simulation water requirement on tomato growth，yield，fruit quality and water use efficiency in
substrate culture with bag．The results indicated that the tomato plant height，stem diameter，fruit diameter，
photosynthetic rate and top dry weight declined along with the decrease of irrigation quantity．Under CK
treatment，the single plant yield was the highest（4.66 kg），which was 4.3%，23.3% and 47.9% higher than
that of W1，W2，and W3 treatmens，respectively，but the difference was not significant with W1 treatment．
The soluble sugar，sugar acid ratio，VC content were increased and the fruit quality was improved，along with
suitable reducing the irrigation quantity，wherein the W3 treatment was the best，W1 treatment took the second
place．Under W1 treatment，the water use efficiency was the highest（51.76 kg·m^-3），which was 10.3%，0.6%
and 5.9% higher than that of W1，W2，W3 treatments，respectively．In this experiment，W1 treatment，on the
basis of guaranteeing fruit yield and quality，has greatly improved the water use efficiency．The composite model
is suitable for water management application in tomato substrate cultivation.

Key words: Greenhouse, Tomato, Bag cultivation, Irrigation model, Water use efficiency

摘要：

采用番茄叶面积指数模型结合水分吸收模型计算番茄植株每日需水量的方法，研究不同灌水量（CK，经验型灌水量；
W1，模型计算灌水量；W2，低于模型计算15% 灌水量；W3，低于模型计算25% 灌水量）对日光温室基质袋培番茄生长、产量、
品质及水分利用效率的影响。结果表明：番茄植株的株高、茎粗、果实横径、光合速率和地上部干质量等随灌水量的减少呈
下降趋势；对照的单株产量最高，为4.66 kg，分别比W1、W2 和W3 处理增产4.3%、23.3% 和47.9%，但与W1 处理差异不显著；
适宜降低灌水量可增加果实可溶性糖含量、糖酸比及VC 含量，果实品质提高，其中W3 处理最优，W1 处理次之；W1 处理
的水分利用率最高，为51.76 kg·m^-3，分别比对照、W2 和W3 处理高出10.3%、0.6% 和5.9%。在本试验条件下，W1 处理在
保证番茄产量和品质的基础上，显著提高了水分利用效率，该复合模型适合日光温室基质袋培番茄水分管理应用。

关键词: 日光温室, 番茄, 袋培, 灌水模型, 水分利用效率