Rotvora is a perennial creeping plant. The spinach leaves are eaten with young stems and leaves. The harvest period of spinach is long and it is a leafy vegetable growing in summer. The water spinach has strong branching ability from the leaf shoots to the young shoots and can be picked many times without being constrained by high temperature and heavy rain.
One is the field management: the water spinach from the cotyledons to 4-5 leaves of the seedling stage, the optimum temperature is 20-25 °C. The suitable temperature for the growth period of stems and leaves is 25-35°C, and it is not imposing on the light conditions. Demand for water and fertilizer is very large, in addition to the application of base fertilizer, but also a large number of topdressing, each picking once 1 to 2 times, top dressing concentration should be light after the thick, dominated by nitrogen. Both drought and nutrient deficiency affect yield and character. The harvest of spinach vegetables, if it is a one-time harvest, can be seedlings when the plant height is 12-15cm. If it is harvested multiple times, it can be listed at the plant height of 18-21 cm, and the row spacing is 12-15 cm. The remaining seedlings can be harvested and listed on multiple occasions. When the plant height is 33 cm, it is the first time it is started. Picking leaves two stem segments at the base of the stem. The second picking was taken from the second node left by the stem base. The third pick picks off the first stem left from the base of the stem to regenerate the stem base. In this way, the stems that are later picked can remain stout. It is advisable to pick it by hand when picking, if it is cut with a knife or other iron, it is easy to emerge and the knife edge is rusted.
The second is the control of pests and diseases: Botrytis cinerea, Plutella xylostella, aphids, leaf-worms and other insect pests should be controlled in time. Diseases are mainly caused by the damage of white rust, which can be sprayed with 1:1:200 Dole wave to prevent and treat. Each interval is appropriate for 10 days.
The frequency of the ultrasonic energy meter is 1 megahertz (1 million Hz / s), the direction is accurate, and the penetration is strong. Through the three major effects of sound waves (mechanical, warm, physical and chemical effects) on various parts of the human body, to achieve the role of massage relaxation.
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