In recent weeks, severe freezing weather has caused significant damage to key citrus crops in Jiangxi, including Nanfeng Oranges and Gannan Navel Oranges. According to Huang Jianmin, secretary of the Jiangxi Provincial Institute of Horticulture, the cold temperatures have mainly affected the branches of fruit trees, leading to breakage and potential long-term harm if not properly addressed.
Once farmers notice broken branches, it is crucial to prune them immediately. After pruning, wrapping the wounds with straw can help protect the tree from further frost damage. This method not only prevents additional injury but also promotes faster healing of the affected areas.
In cases where the roots of the fruit trees are exposed due to soil erosion or other factors, timely cultivation is essential to cover and protect the roots from freezing. Farmers are advised to take this step as soon as possible to ensure the survival of their orchards during harsh weather conditions.
Additionally, increasing the temperature within the orchard can be an effective way to prevent frost damage. One common practice is to burn straw or chaff in the fields, which generates heat and creates a protective microclimate around the trees. This technique is especially useful in low-lying areas where cold air tends to settle.
By combining these measures—pruning, wrapping, cultivating, and using fumigation—farmers can significantly reduce the impact of freezing weather on their citrus crops. These actions not only help preserve the current harvest but also support the long-term health and productivity of the orchards.
The valve stem is an important part of the valve.
It is used to drive, connect the actuating mechanism or handle, and directly
drive the spool to move or rotate, so as to realize the function of valve switch
or regulation.Valve stem in the valve opening and closing process is not only
moving parts, stress components, but also seals. At the same time, it is
subjected to the impact and corrosion of the medium, and it also causes friction
with the packing. Therefore, in selecting the stem material, it must be
guaranteed that it has sufficient strength at the prescribed temperature, good
impact toughness, scratch resistance, corrosion resistance. The valve stem is a
vulnerable part, and the mechanical performance and heat treatment performance
of the material should be paid attention to when selecting.The valve stem in the
valve opening and closing process, under tension, compression and torsion force,
and direct contact with the media, as well as the relative motion between the
friction and filler, so in the choice of stem material, must ensure that it
provides adequate temperature strength, good impact toughness, abrasion
resistance and corrosion resistance of.
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