how to water vegetables how to water vegetables watering precautions
Why water vegetables
From a scientific point of view, plants can grow without chemical fertilizers and pesticides, but they must have water. When water is absorbed by the root system, it also carries the crop growth
The macronutrients are then transported to the stems and fruit pieces. Some of them are lost through transpiration of leaves, and the other part will be lost through photosynthesis of leaves and stems
converted into nutrients.
How to tell if vegetables need watering
1. Determine whether to water according to the soil moisture content
Vegetable roots directly absorb water from the soil, and the amount of water in the soil directly affects the absorption of roots. Therefore, watering can be judged by soil moisture content. - Generally, take 10cm deep soil. If you grasp it into a ball, put it down on the waist and spread it out on the ground, indicating that the moisture content is suitable and no watering is required; if the soil cannot be grasped into a ball, it indicates that the soil is short of water and needs to be watered; if the water is grasped, it will fall to the ground If it does not disperse, it means that the soil is too watery and does not need watering.
2. Determine whether to water according to the growth characteristics of vegetables
(1) Seed germination stage: sufficient water is required for the seeds to absorb water to expand, promote germination and elongation of the hypocotyl. This period should be fully irrigated or sown when the soil moisture is good.
(2) Seedling stage: The leaf area of the plant is small, the amount of transpiration is small, and the water requirement is not much, but the distribution of the root group is shallow, and it is easily affected by drought. Special attention should be paid to maintaining a certain soil moisture in cultivation.
(3) Prosperous vegetative growth period and nutrient accumulation period: the period with the most water demand. Care must be taken not to supply too much water when the nutrient reservoir begins to form, in order to inhibit the growth of stems and leaves and promote the formation of product organs. When entering the peak period of product organ growth, it should be watered frequently.
(4) flowering and fruiting period: flowering and fruiting have strict requirements on water, too much water, easy to make stems and leaves grow leggy and cause flowers and fruits; too little water, the water in the plant is redistributed, and the water is absorbed by the parts with less water absorption (such as Young shoots, young roots, etc.) will flow into the leaves with strong water absorption, which will also cause flowers and fruits to fall. Therefore, irrigation should be properly controlled during the flowering period. After entering the results period. Especially in the fruit expansion period or the fruiting period, the water demand increases sharply and reaches the maximum amount. Sufficient water should be supplied to make the fruit expand and mature rapidly.
3. Irrigation according to meteorological characteristics
From March to June, the outside temperature will gradually rise, the light will increase, the growth rate of vegetables will increase, and the amount of transpiration will increase. At this time, the amount of irrigation should be gradually increased, but the amount of irrigation should not be too large. If drip irrigation technology is used, it should be controlled at About 8 square acres each time.
From June to September, the cultivation in the protected area is mainly rain-proof and cooling cultivation, and the irrigation should be determined according to the rainfall. If there is a lot of rain and the air humidity is high, it should be irrigated less, and at the same time, waterlogging and drainage should be prevented; if there is little rain and the weather is dry, the number of irrigation times and the amount of irrigation should be appropriately increased, so as to meet the water demand of vegetables while reducing the ground temperature and promoting vegetable production.
Vegetables grow. .
Beginning in mid-September, vegetable cultivation is dominated by protected areas, and the outside temperature begins to drop gradually. According to crop growth and weather conditions, the amount of irrigation should be gradually reduced.
