Effects of Temperature and Moisture on Seed Germination of Artemisia halodendron The genus Artemisia is the largest genera in the family Scrophulariaceae, with about 600 species. There are about 340 species of horseshoe crab in China, accounting for more than half of the world's total. The seed germination temperature and water content of the Artemisia halodendron seedlings were suitable for the faster and healthier growth of the seed. In this paper, we mainly obtain from the experimental data, how the seed germination is affected by environmental temperature and soil moisture. During the entire test process, the most commonly used is the temperature and humidity self-recording instrument. The temperature and humidity self-recording instrument is an instrument with a temperature sensor and a humidity sensor, which can simultaneously measure temperature and humidity. The growth of seeds can be expressed by parameters such as germination rate, germination potential and germination time lag. The test procedure is as follows: Effect of temperature on seed germination. 50 seeds were randomly selected and placed at 6 constant temperature conditions of 5, 10, 15, 20, 25, 30°C and 25°C/20°C, 20°C/15°C, 25°C/15°C, 15°C/10°C. , 20°C/10°C, 25°C/10°C, 15°C/5°C, 20°C/5°C, 25°C/5°C, germination test under 9 temperature conditions of daylight (14)/night (10 h), Each process is set to repeat 4 times. In actual operation, the temperature control needs to be measured at any time using a self-recording thermometer and hygrometer. Germination of seeds is marked by the appearance of radicles. The number of germinating seeds was counted twice a day, morning and night, and the filter paper was kept moist, and the germinated seeds were picked out until no seeds continued to germinate for 5 consecutive days. Effects of Soil Moisture on Seed Germination. The seeds were placed on the bottom of a petri dish and washed with 60 g of dried quartz sand (particle size 0.5-3.0 mm) to cover about 1 cm, and 2.25, 3.00, 4.50, 6.00, 7.50, 9.00, 10.50, 12.00 ml of distilled water was added. That is, the sand moisture content was 3.75%, 5.00%, 7.50%, 10.00%, 12.50%, 15.00%, 17.50%, 20.00%, and the seeds were germinated at the optimum temperature. Weigh it once a day, and add water lost due to evaporation to maintain a constant humidity. The rest of the process is the same as the effect of temperature on seed germination. The influence parameters of seed germination were determined as: germination rate = number of normal germinated seeds at the termination of germination/number of test seeds × 100%; germination potential = (number of germinated seeds at the time of peak germination/number of test seeds) × 100%; germination time lag: the start time of germination refers to the time required from the start of cultivation to the first seed germination; germination duration: the time required for the entire germination of the seed; germination index = ∑Gt/Dt, In the above, Gt is the number of germinated seeds at different time (t), and Dt is the corresponding number of germination days. The larger the parameter value, the shorter the germination experience time and the faster the germination; the germination coefficient is 100 (A1+A2+...+An)/( A1T1+A2T2...+AnTn); Peak=Gpt/Dpt, where Gpt is the number of germinating seeds at the time of reaching the peak of germination, Dpt is the corresponding number of germination days, and peak time is the number of days the seeds need to reach the peak of germination. Through the above experiments, we have come to the conclusion that suitable soil moisture is an important guarantee for seed germination. When the temperature difference between day and night is relatively large, the seed germination rate and germination rate of Ma.
Describe:
The line strainers should be installed the upstream shutoff valve and the inlet the backflow preventer .The line filters are installed on the pressure line of the hydraulic system to filter out the mechanical impurities mixed in the hydraulic oil and the colloid, leachate, carbon residue, etc., resulting from the chemical changes of the hydraulic oil itself, so as to prevent the valve core from getting stuck. The clogging of slot and damping hole in throttle hole and the breakage of hydraulic components. The filters have good filtering effect and high precision, but it is difficult to clean after clogging, and the filter elements should be replaced.
Characteristics:
The line filters are especially suitable for automatic control systems and servo systems. It can prevent high precision control elements and actuators from being worn out or jammed too early because of pollution, thus reducing the failure and prolonging the service life of the components. The filter adopts imported fiberglass Filter Material, which has the advantages of high filtration precision, strong oil flow ability, small original pressure loss and large amount of sewage.
Product types:
1. LPF series: Low pressure line filters
2. MPF series: Med-pressure line filters
3. HPF series: High pressure line filters
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