Drought damage of planting jujube and its control measures
Jujube is relatively strong in drought resistance, commonly known as "iron crop", but if long-term drought can not meet the minimum water requirements for jujube growth and development, it will seriously affect the growth, development and fruit of jujube.
1. Symptoms of drought injury
The main results are as follows: (1) the growth and development stopped because the root system could not absorb water for a long time to supply the aboveground part of the growth and development, resulting in transpiration greater than absorption, resulting in the imbalance of water balance in the tree, causing the slow growth and development of jujube trees and accelerating the senescence of jujube trees. Especially for nursery seedlings and newly developed young trees, such as lack of water for a long time, often cause seedlings and young trees to dry up.
(2) in the growing season of jujube trees, there are some drought and no rain, the leaves of jujube trees are curled, and then yellowing and shedding; the flowering stage is dry, scorched flowers, no honey, and the fruit setting rate is very low; the drought in the young fruit stage leads to softness, wrinkling, dehydration and shedding of young fruits.
(3) the ability of resistance to diseases and insect pests decreased due to the decline of tree body and resistance to diseases and insect pests caused by long-term drought. For example, long-term drought often leads to the outbreak of jujube tick, red spider, scorched leaf disease and so on.
two。 Prevention and cure measures
The main results are as follows: (1) when building the garden, pay attention to the construction of irrigation system, watering and replenishing water in time in case of drought.
(2) strengthen the management of jujube orchard, carry out measures such as ploughing and weeding, tree plate mulching and so on to maintain soil moisture.
(3) spraying water in jujube garden, increasing air humidity, reducing water evaporation and alleviating part of drought.
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Prevention and control of main diseases and insect pests in planting jujube
1. Main diseases 1. Jujube rust. The disease mainly damages leaves and sometimes fruits. The damaged leaves scattered light green dots on the back, then gradually turned grayish brown, and finally the disease spots became yellowish brown, resulting in protruding summer spore piles. The leaf is facing the heap of summer spores
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How to control the low fruit setting rate of planting jujube trees
1. Pay attention to shaping and pruning because the branch and bud types and growth and fruiting habits of jujube trees are different from other fruit trees, and they are not sensitive to pruning, so they must be guided according to the situation, shape with branches, trim lightly, and combine winter and summer pruning, so as to make the distribution of main branches reasonable and hierarchical. Select
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