Fertilizer and water management: After about one week of planting of zucchini, it is necessary to timely spray the seedling water, and combine the watering to chase the seedling fertilizer for one time, mainly to the decomposed organic fertilizer, and promote the growth of the seedlings. After watering, it is necessary to cultivate the loose soil in time to increase the ground temperature and promote the root growth of the plant. In the water supply should be based on the principle of pouring water without watering the flowers, do not pour large water before the first melon is preserved, so as to avoid the imbalance of vegetative growth and reproductive growth due to the excessive water in the early stage, and the phenomenon of melons appear. Fertilization is mainly based on organic fertilizer and supplemented by chemical fertilizer. Spraying Zhuangguatiling before planting, melon and expansion is to increase the water absorption and absorption capacity of zucchini, and promote the rapid expansion and high yield and high yield of the melon. Increasing the fruit setting rate: Due to the low temperature and less insects in the early growth period of zucchini, it is not conducive to fertilization, and the number of female flowers is large and the number of male flowers is small, and the pollen is insufficient. In order to increase the fruit setting rate of zucchini and increase the pre-production and total yield, it is best to carry out artificial supplementary pollination. It is better to enhance the quality of pollen fertilization and increase the fruit setting rate. Plant adjustment: During the cultivation process of zucchini, attention should be paid to removing lateral buds and side branches at any time. In the period of fruiting, it is necessary to prevent too many results from falling. Generally, 2 leaves and 1 melon are suitable for fruit retention for fruit thinning. Remove old leaves and diseased leaves to promote ventilation and light transmission and increase yield. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
The piston is one of the main moving parts of the
engine, is composed of combustion chamber components. Engine Piston Parts,Engine Parts ,Car Engine Parts,Parts Of Engine,Piston Engine Parts ZhouShan HeCheng Machinery Co., LTD. , https://www.hcmarineparts.com
The pressure of the gas
piston through the connecting rod to the crankshaft, realize the change from
heat energy to mechanical energy.
The work condition is very bad, and the
temperature of 1400-1800 DEG C, and pressure
Up to 13MPa above the gas
contact, greatly alternating thermal stress and mechanical stress.
And by the
serious corrosion of gas, and under the condition of boundary lubrication and
cylinder wall friction and strong impact 1 times.
The piston in high
temperature, high pressure, strong corrosive gas contact so that it has enough
strength and hardness,
Heat resistance and good thermal resistance, high
fatigue strength and corrosion resistance. For high speed diesel Engine Piston
also requires light as far as possible.
In order to reduce the inertia
force.
Marine piston large low speed diesel engine of the crosshead is
usually combined.
The heat treatment process by normalizing and annealing,
and iron pearlite are ferrite organization, has good heat resistance.
Piston
alloy quenched and tempered steel has better heat resistance and corrosion
resistance. The skirt with nodular cast iron annealing treatment, with good wear
resistance.