Convolvulus, also known as leeks and bamboo leaf vegetables, is a nutritious green leafy dish. Convolvulus is generally cultivated on dry land. China has cultivated more plants in South China and Southwest China, followed by Taiwan, Central China, and East China. There are sporadic cultivation in the north. The key cultivation measures are as follows:
First, according to local conditions, select high-quality varieties:
According to whether or not seedlings can be divided into two types, sub-pupa and rattan, sub-pupa can be divided into white flower seeds and purple flower seeds. Fujimaki rarely flowers in the south, and it is difficult to bear fruit. The stems are propagated in production, and high-quality varieties are selected for planting.
Second, according to local conditions, the construction of nutrition pool:
The nutrient solution of the cultivated water spinach in the deep liquid floating board is recycled. The nutrient pool is divided into a cultivation pool and a reservoir. The cultivation ponds are of the ground type, and there are two types of ladders and slopes. The stepped cultivation pond is composed of several pools of different heights. One end of the pool has a lower outlet area than the other places of the pool, so that the nutrient solution flows from the high-level cultivation pond to the lower-level cultivation pond and finally flows into the reservoir. The slope-type cultivation pond is a one-piece type, but the bottom surface is inclined, and the nutrient solution can flow from a high place to a low place and eventually flow into the liquid pool. The reservoir is underground. The cultivation pond has a width of 1.5 to 2 meters, a depth of 60 centimeters, and an unlimited length. The surface of the nutrient solution is placed on a foam plate for fixing the water spinach.
Third, nurture age-appropriate seedlings and plant suitable plants:
A composite matrix consisting of 5 parts of phytocosan, 3 parts of vermiculite, and 2 parts of perlite was used to raise seedlings in plugs of 128 wells, with 1 seed and 2 seeds or multiple seeds, and water was sprayed after sowing. 3 leaves 1 heart to 4 leaves 1 heart colonized. Later, stem segments with 2 to 3 nodes can be used for cutting propagation. Prior to planting, a circular hole with a diameter of 1.2 cm was drilled on a foam board in a size of 12 cm and 8 cm. After the plant roots were washed with water, the plants were fixed in round holes with rock wool or cotton, and the position was suitable for immersing in water.
Fourth, to ensure comprehensive nutrition, choose a good nutrition formula:
The composition of the nutrient solution for the cultivation of water spinach needs to meet its growth needs, including a large number of elements and trace elements. The conductivity of the nutrient solution is maintained at 1.5 to 1.8 millisiemens per centimeter (mS/cm), and the pH is around 6.5. When formulating the nutrient solution, the pH of the water should be firstly formulated to make it slightly acidic, so as to avoid precipitation when other components are added to the water.
V. The timely detection of nutrient solution to ensure a balanced supply of nutrients:
In the production process, the water spinach needs to absorb nutrients, so that the concentration of the nutrient solution is reduced, and the nutrient solution is lost due to evaporation or other reasons. Therefore, the conductivity value and the pH value of the nutrient solution should be promptly detected. When the conductivity value is lower than 1.5 millisiemens per centimeter (mS/cm) and the pH value is increased, the nutrient solution should be formulated and supplemented in time.
Sixth, timely control of pests and diseases to ensure product safety without pollution:
The cultivation of deep-flow floating boards for water spinach is carried out in protected areas with little pests. Diseases often occur with calcium deficiency and bacterial diseases, and can be controlled by spraying 2000 mg/kg of calcium chloride solution and 200 mg/kg of agricultural streptomycin.
VII. Harvesting in Time:
When the plants are about 30 cm high, harvest them in time. The stems are cut from the base of the stem and the bundles are sold. Using the habit of strong stalking ability, the remaining part can continue to be cultivated and can be harvested 3 to 5 times.
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