How do kiwis deal with high temperatures
Kiwi is a crop that is neither drought-tolerant nor heat-tolerant, and is extremely vulnerable to dry heat. Kiwi planting has the following measures to cope with high temperature weather:
Irrigate in a timely manner. In high-temperature weather, you should irrigate frequently, use all water sources to pay close attention to irrigation, and keep the soil moisture in the orchard. Conditional parks should strengthen the construction of irrigation measures such as sprinkler irrigation and drip irrigation during the construction of the park. In areas with insufficient water sources and prone to high temperature and drought hazards, it is necessary to strengthen water management in critical periods to make up for insufficient precipitation. Irrigation time should be selected before 11 a.m. and after 17 p.m. to prevent tree and fruit burns.
It is an effective measure to increase the drought resistance and water-saving cultivation of trees by covering grass reasonably during the period of high temperature and drought. Orchard grass can not only reduce water evaporation, keep the soil moist, loose, stabilize the ground temperature, and protect the normal growth of the root system, but also prevent soil compaction and weeds, reduce the number of tillage times, and effectively improve the garden microclimate.
Pruning sparse fruit adult trees should be properly wiped buds, when the branches grow to 40 ~ 50 cm topping. Wipe the buds and topping once every 7 to 10 days to help the branches become full and aging, reducing water transpiration. In case of continuous high temperature weather and the water source cannot be guaranteed, in order to prevent the plant from dying due to drought, one is to appropriately increase the amount of pruning in summer to reduce the water transpiration of the tree; the second is to shed a lot of fruits to reduce their competition for nutrients and water.
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Low content monomer plant extract, main content 1%-50%. Including but not limited to Pu-erh tea extract 40%, rhodiola rosea extract 1%, 3%, pueraria root extract 30%, 40%, celery extract 5%, salvia miltiorrhiza extract 5%, 10%, burdock seed extract, salicin 5%, aloe vera extract, gynost' pentaphyllum extract 20%, green tea extract, ginseng extract, chlorogenic acid extract.
Plant extraction process
1. Select plants/herbs. No more than ancient prescriptions, prescriptions, folk herbs to find. At present, common and uncommon herbs have been studied. At present, it is mostly to increase the amount of medicinal materials to extract and separate components with low content, or to find medicinal plants that have never been studied from miao medicine, Tibetan medicine, Mongolian medicine, Africa, Latin America and other places.
2. The extraction. Solvent petroleum ether, n-hexane, cyclohexane, benzene, chloroform, ethyl acetate, n-butanol, acetone, ethanol, methanol, water (low polarity → high polarity). Daily medicine decoction effective, water and ethanol and other solvents with large polarity, such as artemisinin boiling ineffective extraction with petroleum ether and other solvents with small polarity. Common medicinal materials water/alcohol/ether to go through, separation and identification of more compounds.
3. The separation. This is the most important work. In the solution extracted from the second step, there are dozens of compounds, usually by column chromatography, which is often referred to as the column flushing. It's a lot of work, it's boring, it's low tech. A master's student might do this every day for two years. The column for separating compounds, as shown below, is as large as 2 meters high and as small as 10 centimeters. Change the solvent condition of mobile phase, change the material of column, different conditions and different separation principles of column repeatedly punching, can be separated from the monomer compound.
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