From the beginning of the flower to the female flowers, the watermelon should be promoted mainly, the purpose is to promote the growth of stems and leaves, lay the material foundation for the development of flower organs.
In this period, the water requirement of plants increased, the amount of watering should be appropriately increased, and 15 to 20 kg of compound fertilizer per acre in combination with watering can be applied with water. In order to prevent boron deficiency and produce physiological diseases, foliar spray of 0.1% to 0.2% borax solution can be applied, and pressure vines and pruning work can be performed at the same time. Generally, when the main vine grows 40 to 50 centimeters, the first knife is pressed, the second knife is pressed when the centimeter is 100 centimeters long, and the third knife is pressed when it is 150 centimeters long. Three-vine pruning is usually used, ie, leaving one main vine and two robust side vines from the base of the root, and the rest are cut off. The main vine stays between 10 and 18 knots, leaving 1 melon per plant. Can stop pruning.
During this period, we should also implement timely cultivating and weed control, and pay attention to the prevention and control of diseases such as blight, anthracnose, leaf blight, keratoses, and locusts.
Sitting period
From the beginning of the flowering of the male flower of the watermelon to the hair removal of the fruit, the vegetative growth of the stem and the leaf should be mainly controlled, and the development of female reproductive organs such as female flowers should be supplemented to achieve the combination of promotion and control.
This period is an important stage for watermelon cultivation. Water and fertilization should be strictly controlled in production, and technical measures such as pruning and pressing vines should be adopted to control the growth of stems and leaves, reduce nutrient consumption, and avoid falling and budding due to the madness of stem vines. If there is a continuous rainy weather, affecting insect activity, measures such as artificial pollination or hormone treatment may be taken to increase the rate of sitting.
Swelling period
From the fruit to the physiological maturity, this period has a great influence on the yield, which is a crucial period to determine the quality of the fruit.
During this period, the diameter and volume of watermelon fruit increased dramatically, and the demand for water, fertilizer and nutrients was greatest. In the watermelon egg size, it is necessary to pour the swelled melon water once, and apply 20-30 kg of compound fertilizer per acre. Before and after the fruit is set, 0.2% urea solution or potassium dihydrogen phosphate solution can be used to spray the leaves to prevent the leaves from being sprayed. Premature aging. Then watering according to the soil and precipitation, so that a balanced water supply. Watering is prohibited 7 days before fruit harvest to increase the sugar content of the fruit.
During this period, attention should be paid to the prevention of soil-borne diseases such as blight and root rot. Once onset, it is necessary to promptly use the fulvic acid 1000 times + potassium permanganate 500 times + mancozeb 1000 times irrigate.
API
Carbohydrazide Dl Serine,Dopa Decarboxylase Inhibitor,Docosahexaenoic Acid Dha,Benserazide Dopa Decarboxylase Inhibitor
SHANDONG XINHUA PHARMACEUTICAL Co., Ltd. , https://www.sdxinhuapharm.com