Water tension thresholds for processing tomatoes under drip irrigation in Central Brazil

Waldir A. Marouelli; Washington L. C. Silva

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Water tension thresholds for processing tomatoes under drip irrigation in Central Brazil

机译：巴西中部滴灌条件下处理西红柿的水张力阈值

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Drip irrigation has the potential to save water and mitigate foliar diseases for processing tomato production in Central Brazil. Four experiments were carried out at Embrapa Vegetables, Brasília, Brazil, to establish irrigation management strategies during vegetative, fruit development, and maturation growth stages of drip-irrigated processing tomato. Soil water tension (SWT) threshold values ranging from 5 to 120 kPa were evaluated. Plants growing under higher water deficit during the vegetative stage showed root systems up to 10 cm deeper than those irrigated more frequently. Maximum fruit yield was reached when irrigations were performed at SWT thresholds of 35, 12, and 15 kPa during vegetative, fruit development, and maturation growth stages, respectively. Total soluble solids content was not affected by irrigation treatments during vegetative and fruit development stages, but increased as SWT increased during fruit maturation growth stage.

机译：滴灌技术有潜力在巴西中部加工番茄生产时节水和减轻叶面疾病。在巴西巴西利亚的Embrapa蔬菜公司进行了四个试验，以建立在滴灌加工番茄的营养，水果发育和成熟生长阶段的灌溉管理策略。评估了5至120 kPa的土壤水分张力（SWT）阈值。在营养阶段，水分亏缺程度较高的植物生长出的根系比更频繁灌溉的根系深达10厘米。在营养，果实发育和成熟生长阶段分别以35、12和15 kPa的SWT阈值进行灌溉时，可以达到最大的水果产量。在营养和果实发育阶段，总可溶性固形物含量不受灌溉处理的影响，但在果实成熟生长阶段，随着SWT的增加而增加。

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《Irrigation Science》 |2007年第4期|411-418|共8页
作者
Waldir A. Marouelli; Washington L. C. Silva;
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Embrapa Vegetables P.O. Box 218 70359-970 Brasilia DF Brazil;

Embrapa Headquarters Parque Estação Biológica—PqEB so. 70770-901 Brasilia DF Brazil;

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Water tension thresholds for processing tomatoes under drip irrigation in Central Brazil

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