The Effect of Daily Nutrient Applications on Yield, Fruit Quality, and Nutrient Uptake of Hydroponically Cultivated Tomato
The Effect of Daily Nutrient Applications on Yield, Fruit Quality, and Nutrient Uptake of Hydroponically Cultivated Tomato
复制标题
日常施肥对水培番茄产量、果实品质和养分吸收的影响
DOI：
10.2503/jjshs.75.421
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发表时间：
2006
影响因子：
--
通讯作者：
M. Takaichi
中科院分区：
文献类型：
--
作者：
Y. Nakano;Shin;H. Kawashima;M. Takaichi
每日营养添加减少营养供应和浓度的水培溶液中，而不影响果实产量和质量的番茄“文艺复兴”，生长在2003-2004年冬季和2004年夏季。结果进行了比较，通过传统的EC为基础的情节。在每日养分添加小区中，根据番茄植株在三种不同施用量（低、中、高营养液）下的水分吸收来供应所有养分。在冬季试验中，培养基处理中的养分水平（除硫外）相对于EC为基础的处理降低到53-66%，在夏季试验中降低到73-77%。除移栽后30 d外，低、中营养液中氮、磷浓度分别不超过10 mg·L-1和3 mg·L-1。叶片对大量养分的吸收总量和干重积累量随养分供应量的增加而增加。中、高处理的产量与EC处理相当。每日添加养分可提高果实可溶性固形物含量和抗坏血酸含量，但对可滴定酸含量无影响。据估计，如果水分吸收保持在0.5 L·plant − 1 ·day − 1，则添加50 mg N·plant − 1·day − 1足以维持番茄植株的正常生长。随着水分吸收的增加，氮可以增加到130 mg·plant-1 ·day-1。因此，这种易于调节的营养添加系统可以通过防止过度营养生长来提高番茄果实的生产力，同时减少废水对环境的影响。
Daily nutrient additions reduced nutrient supply and concentration in the hydroponic solution without affecting fruit yield and quality of tomato ‘Renaissance’, grown during the winter of 2003–2004 and the summer of 2004. The results were compared to those obtained by the conventional EC-based plots. In the daily nutrient addition plot, all nutrients were supplied according to water uptake by tomato plants under three different application rates (Low, Medium, and High nutrient solution). The nutrient levels in the Medium treatment were reduced, except for sulfur, to 53–66% with respect to the EC-based treatment in the winter experiment and 73–77% in the summer experiment. Nitrogen and phosphorus concentration in the Low and Medium nutrient solution did not exceed 10 mg·L − 1 and 3 mg·L − 1 , respectively, except for 30 days after the transplanting. The total amount of macro nutrient absorbed and dry weight accumulated by leaves increased with increasing nutrient supply. The yields from the Medium and High treatments were equal to the EC-based treatment. Daily nutrient addition increased soluble solids content and ascorbic acid, but it did not influence titratable acidity in fruits. It was estimated that the addition of 50 mg N·plant − 1 ·day − 1 is adequate to maintain normal growth by tomato plants, provided the water uptake was kept at 0.5 L·plant − 1 ·day − 1 . N could be increased to 130 mg·plant − 1 ·day − 1 with an increase in water uptake. Thus, this system of nutrient additions that can be easily regulated could increase productivity of tomato fruits by preventing excess vegetative growth, and simultaneously reduce the environmental impact of wastewater.