EJ Industrial Group Co.,Ltd is a leading professional valves manufacturer in China.
Our industry valves products range cast steel and forging steel Floating Ball Valve, Trunnion Mounted Ball Valve, DBB ball valve, gate valve, globe valve, check valve and high performance butterfly valves. The fields we serve include oil and gas, LNG, refinery, chemical, pharmacy, mining industry, and so on.
All our products are manufactured and tested according to international standards API 6D, API6A, API600, ANSI B16.34, API607, API6Fa, API 591, API594,API609, API602, BS5153, BS1868, BS1873, DIN3202, DIN3352, BS5163, BS5153,BS5150, AWWA C509, API598, and EN12266.
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Multi-point Soil Temperature and Humidity Recorder Test Set up four methods for mulching and green manure cultivation (GMPM): Green manure is planted immediately after harvesting, and green manure is placed in the ditch and above seed potato after potato sowing and ridge cover Mulch; green manure cultivation method (GM); green manure above the potato in the ditch and above the seed potato, after ridging without cover film; plastic film cover cultivation method (PM): do not green manure, sowing ridge cover mulch Ordinary cultivation method (CK): Do not use green manure, but do not cover the mulch after sowing. The test of the multi-point soil temperature and humidity recorder was completely randomized and arranged in four replicates.
The change of daily average temperature of soil in the plough layer during the growth period of potato shows that the effect of different cultivation methods on the daily average temperature of the soil is mainly manifested in the seedling stage, and has a tendency of shrinking; the change of flowering period and seal period is not obvious. Through the measurement of multi-point soil temperature and humidity recorders, the average daily temperature of the plough layer was increased by 3.6°C and 2.9°C, and the accumulative temperature was increased by mulching and applying green manure cultivation methods and plastic film mulching methods, respectively, from the time of sowing to mid-May. °C and 149.3 °C.
In the seedling stage, the membrane treatment method makes the planting temperature rise faster, because it is easy to accept solar radiation at the seedling stage, the temperature is low, the surface membrane has a good thermal insulation effect, and the soil temperature at this stage is obviously higher by the multi-point soil temperature and humidity recorder. For cultivation methods without covering treatment. In the late stage of potato growth, the rapid rise of temperature and rapid increase of crop coverage have affected the radiation of sunlight on the ground. As a result, the surface soil temperature has decreased and gradually stabilized.
The organic matter contained in the soil and various factors have a great influence on the crops, and the effects of moisture and temperature are particularly important. The timely detection of potatoes in different planting modes is done through a multi-point soil temperature and humidity recorder for timely detection. The influence of cultivation methods on the yield of the above research provides some reference for the changes and influences of the soil fertility of potato during the growth process, and even the choice of cultivation methods.