Response of truss tomato yield to above-optimal average greenhouse temperatures and to soil bedding features
Vegetablesתחום או ענף ירקות
תאריך עדכון 18/2/2008
תיאור מלא Truss tomatoes (varcv. PrincesNesicha) were planted on June 20, 2005, in a cooled greenhouse and were grown for 176 days, until mid-December. Harvest started 61 days after planting and lasted 115 days. Mean fruit yield per greenhouse was 17.8 Kg•m-2, with an average harvest rate of 4.7 Kg•m-2 per month for the entire harvest period. Until the beginning of November, the average daily temperature was above 18°0C. The average daily temperature increased along the rows in accordance with the distance from the cooling pad (0.03°0C•m-1, an average for the entire cooling period). The decrease in the relative yield as a result of the temperature rise along the row was -7%•°0C -1, largely due to a decline of 10%•°0C -1 in the number of harvested clusters. These parameters agree with the results of a previous experiment (2004).
This study indicates that the relative yield for a season largely depends on the average daily temperature and is predictable where the latter exceeds 18°0C, according to the following formula: .
The effect of temperature on fruit weight was not linear. Up to 24.3°0C, the fruit weight decreased, however it increased again with the climbing average daily temperature above 24.3°0C, although the number of seeds per fruit kept decreasing linearly. Fruit quality also declined with temperature rise; the portion of fruit disqualified for export and the rate of black-end-rot fruit weight have increased.
Plants grown on nutrition ducts containing tuff subsoil yielded 18% more than plants on regular soil. Most of that difference was attributed to a higher number of clusters. Surprisingly, temperature rise along the row had no adverse effect on the yield of truss tomato plants grown on nutrition ducts, indicating for improved edaphic conditions that enhanced the ability of the plants to cope with increasing temperatures.
שפה English
מחבר Eviatar Itiel, Zahi Rimon, Moshe Rimon, Yoram Zvieli, Rivka Ofenbach
שנה 2007
שייכות Israel Tsabari
תאריך יצירה 18/2/2008
תאריך עדכון 18/2/2008
