A reader from a surnamed Zhang in Liaoyang County asked: How is the appearance of hollow tomatoes? Answer: In the production process of tomatoes in winter greenhouses, external hollow and hollow fruit is easy to appear. This not only directly affects the yield, but also greatly reduces the quality and taste of tomatoes. The direct cause of tomato “hollow†is due to the fact that the water temperature in the greenhouse is lower than 7°C. Under low temperature conditions, the roots of the tomatoes are cold-shrink, the vigor of roots is reduced, and the water absorption is poor. At this time, the tomatoes are in an expansive stage. In the absence of a moisture supply, local fleshy fruit tends to appear. Even though the ground temperature rose later, the roots recovered water, but the hollow part of the expanded fruit could no longer be enriched. Therefore, the water temperature of tomatoes in winter watered greenhouses must be raised to 10°C or more (you can use the temporary corner of the greenhouse to temporarily store water to facilitate warming). Tomato tomatoes can avoid the phenomenon of “hollowâ€.