First, the water requirement of fruit trees
In the phylogeny, fruit trees form ecological types with different requirements for water. In general, they require less water and have xeromorphic traits. For example, fruit trees with small, all-green leaves, thick cuticles, and low stomata may have fruit trees or Strong roots of fruit trees, strong drought resistance. According to different drought resistance and water requirements, fruit trees can be divided into the following three categories:
1. Drought-resistant peaches, almonds, apricots, pomegranates, dates, figs, walnuts, and pineapples.
2. Apples, pears, persimmons, cherries, plums, plums and oranges with medium drought resistance.
3, weak drought resistance of bananas, wolfberry, red bayberry.
Regardless of the sapling or the resulting tree, the water content of each organ is not balanced, and it is often found in organs and tissues that are most actively growing that have a high moisture content. Results The fruit is often the most prominent organ competing with the leaves for water content. In the absence of water, the leaves are preferentially used for transpiration and the fruit is in a water-deficient state, affecting the yield and quality of the fruit.
Fruit trees have different requirements for water during different phenological periods, and require different amounts of water. Usually before deciduous fruit trees sprout in the spring, the trees need a certain amount of water to germinate. In this period, the water is insufficient, and the germination or sprouting is often delayed and the new shoots are affected. Grow. Drought or excessive water during flowering often causes flowering and fruit drop, reducing the fruit setting rate. During the growth period of the shoots, the temperature rises sharply, the branches and leaves grow rapidly, the water requirement is the most, and the response to water shortage is the most sensitive. It is the critical period of water demand. If supply is insufficient, growth is weakened and growth stops even early. Flower buds require relatively little water during the differentiation phase, and if they have too much water they weaken the differentiation. At this point, the north is about to enter the rainy season. If the rainy season is postponed, it can promote early differentiation. Normal rainfall should not be flooded. The fruit development period also needs a certain amount of water, but too much can easily lead to fruit drop or fruit cracking in the later period, which can easily cause fruit diseases and affect the yield and fruit quality. In the autumn drought, the growth of shoots ends earlier and the growth of roots ceases, affecting the accumulation and transformation of nutrients, impairing the overwintering nature, and the lack of water in winter often causes frostbite damage.
Second, the fruit tree water balance and water requirements
The so-called water balance is the state when the transpiration and water absorption of fruit trees are similar. Water balance is the basis for the growth and development of fruit trees and is the scientific basis for irrigation, drainage, and improvement of fruit quality and yield. Regardless of the sapling or the resulting tree, the water content of each organ is not balanced, and it is generally found that the water content is higher in organs and tissues that grow most actively. However, for the fruit trees as a whole, they always maintain a relative water balance at all stages of fruit tree growth and development. The rate of transpiration depends on the microclimatic factors, the morphological structure of the plant and the physiological type.
The weight ratio of transpiration of fruit trees in the growing season to the dry matter produced by them is called water demand and is generally expressed as the amount of water needed to form dry matter. The water requirements of fruit trees differ depending on the species, soil type, climatic conditions, and cultivation management techniques.
The water requirement of fruit trees varies with tree species, soil type, climatic conditions, and cultivation and management. Due to differences in the physiological characteristics of different types of fruit trees, the water requirements also have certain differences. In general, the fruit trees with small, entire, thick stratum corneum, small stomata, and depressed stomata, such as pomegranates, almonds, figs, etc., require small amounts of water, whereas large-sized aquatic fruit trees require larger amounts of water.
Regardless of the sapling or the resulting tree, the water content of each organ is not balanced, and it is often found in organs and tissues that are most actively growing that have a high moisture content. Results The fruit is often the most prominent organ competing with the leaves for water content. In the absence of water, the leaves are preferentially used for transpiration and the fruit is in a water-deficient state, affecting the yield and quality of the fruit.
Fruit trees have different requirements for water during different phenological periods, and require different amounts of water. Usually before deciduous fruit trees sprout in the spring, the trees need a certain amount of water to germinate. In this period, the water is insufficient, and the germination or sprouting is often delayed and the new shoots are affected. Grow. Drought or excessive water during flowering often causes flowering and fruit drop, reducing the fruit setting rate. During the growth period of the shoots, the temperature rises sharply, the branches and leaves grow rapidly, the water requirement is the most, and the response to water shortage is the most sensitive. It is the critical period of water demand. If supply is insufficient, growth is weakened and growth stops even early. Flower buds require relatively little water during the differentiation phase, and if they have too much water they weaken the differentiation. At this point, the north is about to enter the rainy season. If the rainy season is postponed, it can promote early differentiation. Normal rainfall should not be flooded. The fruit development period also needs a certain amount of water, but too much can easily lead to fruit drop or fruit cracking in the later period, which can easily cause fruit diseases and affect the yield and fruit quality. In the autumn drought, the growth of shoots ends earlier and the growth of roots ceases, affecting the accumulation and transformation of nutrients, impairing the overwintering nature, and the lack of water in winter often causes frostbite damage.
Fruit trees need water, but not as much water as possible. Sometimes moderate water shortages in fruit trees can promote the deep rooting of fruit trees, improve their ability to resist late drought, inhibit the growth of fruit trees, reduce the amount of pruning, and make fruit trees as early as possible. Into the flower bud differentiation stage, fruit trees early results, and improve the fruit's sugar content and quality.
Corn are the expression of some anthocyanins produced by the photosynthesis of grains. Different anthocyanins cause different colors.
There are some benefits of corn: 1. Corn can lower sugar;2. The high content of unsaturated fatty acids in maize is beneficial in preventing atherosclerosis, coronary heart disease, myocardial infarction and other diseases; 3. Corn whiskers have diuretic and hypotensive effects, lowering sugar.
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