Peanut crusting period refers to the period of time from the initial emergence of chicken-headed young fruit to the beginning of full fruiting. It is a crucial period for determining the number of pods. The spring sowing season of peanuts in our province is from early July to early August and summer sowing peanuts from early to late August. The main task of field management is to prompt the vegetative body to reach peak value as soon as possible, to maintain a steady growth without lodging, to ensure that the young fruit that has been formed into the soil form as many fruits with economic value as possible, and to prevent the occurrence of pupa and other underground pests. Field management measures:
During the early stage of scab dressing, according to the peanuts, the fruit and fruit surface can absorb nutrients from the soil and supply their own characteristics. In the initial stage of peanut crust, 10-15 kilograms of phosphorus and calcium are applied to the peanut cultivars per acre. The main compound fertilizer can increase the yield of pods by 50 to 100 kilograms per acre, and the quality can also be improved.
Foliar spray fertilizer can be sprayed in the whole growth period or sprayed on the front and back surfaces of the leaves for several times. In high-yielding fields and acidic soil plots, calcium deficiency may affect the yield and quality of peanuts. Spraying foliar fertilizers rich in calcium complexing amino acids can quickly supplement calcium, magnesium and other elements, increase the number of results and improve the quality of pods.
After the growth of peanuts grows, the growth of peanuts rapidly grows rapidly. It should be grasped about 30 days after the initial flowering. The plants have been sprayed twice or about 10 days at intervals of about 15 days. To prevent lodging, delay the leaves, and promote the growth and development of pods.
After the control of pests and rain, it is beneficial to the survival and growth of hatching and newly hatched larvae of earthworms such as earthworms, and to the breeding of leaf pests such as cotton bollworms, bridges, etc., and can be used in combination with topdressing to quickly disinfect insecticide powders in peanut plants. The phoxim poisonous soil was found to be sprayed with an insecticide when the heart was damaged.
Centrifuge tubes are precision-made, high-strength tubes of glass or plastic made to fit exactly in rotor cavities. They may vary in capacity from 50 mL down to much smaller capacities used in microcentrifuges used extensively in molecular biology laboratories. Microcentrifuges typically accommodate disposable plastic microcentrifuge tubes with capacities from 250 μL to 2.0 mL.
Glass centrifuge tubes can be used with most solvents, but tend to be more expensive. They can be cleaned like other laboratory glassware, and can be sterilized by autoclaving. Small scratches from careless handling can cause failure under the strong forces imposed during a run. Glass tubes are inserted into soft rubber sleeves to cushion them during runs. Plastic centrifuge tubes, especially tend to be less expensive and, with care, can be just as durable as glass. Water is preferred when plastic centrifuge tubes are used. They are more difficult to clean thoroughly, and are usually inexpensive enough to be considered disposable.
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