The time for winter pruning of fruit trees is from the natural fall of autumn to the time before the second year of germination. The best time for pruning in winter is when the tree just enters a complete dormancy period, which is normal physiological defoliation, because pruning at this time can consume tree nutrients at least. However, in some places where the winter is relatively cold, in order to prevent the shearing buds from freezing, it is generally carried out after the winter has passed. Winter pruning generally uses methods such as sparse shearing, short cutting, retracting, dumping, and coiling, etc. to promote the combination of control. The high-yield tree structure of Red Fuji apple in full fruit period should be characterized by low-dry and low-crown, more branchlets and less branches; angle opening, suitable spacing, good ventilation and light transmission; more supporting branches, more skirts, large amount of branches, and A large number of robust result sticks. In order to meet this requirement, the following pruning measures should be taken during winter pruning: 1 Opening angle, ventilation, and light transmission The opening angle should be taken into consideration when starting the plastic surgery. For hard-to-open, it is also possible to open the guilt for the first time. Red Fuji fruit can only be colored under direct light. It is required that the center of dried fruit be dry and fall in time, reduce the height of the tree, eliminate excessive branches and raising branches, and keep the sparse state of the big branches. Branches. Ensure that the light in the crown is good to improve the quality of the fruit. 2Adjusting the tree structure and updating the rejuvenation results The production of branches and branches uses “three sets of branches pruning methodâ€, which means a set of fruiting branches for the flowering results in the current year; a set of vegetative branches for the production of nutrients for growth results. , but also increase the tree reserve nutrition; a set of preparations for the formation of flower buds,
P,P-Dichlorophenylphosphine CAS No.644-97-3
Dichlorophenylphosphine Basic Information
Product Name: Dichlorophenylphosphine
CAS: 644-97-3
MF: C6H5Cl2P
MW: 178.98
EINECS: 211-425-8
Mol File: 644-97-3.mol
Dichlorophenylphosphine Chemical Properties
Melting point: −51 °C(lit.)
Boiling point: 222 °C759 mm Hg(lit.)
Density: 1.319 g/mL at 25 °C(lit.)
Fp: >230 °F
Storage temp. :Store below +30°C.
Form: Liquid
Specific Gravity: 1.319 (20℃)
Color: Clear colorless to slightly yellow
Sensitive: Moisture Sensitive
Phenylphosphonium dichloride,Diphenylphosphine chloride,Phenylphosphinic acid,2-hydroxyethylphenylphosphinic acid,Phenylphosphonic dichloride,Phenylthiophosphonochloride
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