Analysis of Coverage Technology on Maize Planting with Quick Soil Moisture Analyzer
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For the soil hydrothermal status of the research object, a rapid soil moisture analyzer can be used to determine the temperature. The traditional method is to measure the ground temperature of 0-25cm in the whole growth period of corn, 1 layer per Scm, and 1 bit per cell. Point, fixed-point determination. Among them, the full-film double-ridge planting was repeated at the randomly selected points on large ridges and small ridges according to the test, and sand film dual coverage was measured on the ridge surface. It is measured once every 15 days at 8:00, 14:00, and 20:00. During the whole growth period of corn, soil water storage in 0-200cm soil layer was measured by a drying method. The soil water volume was 1 layer for every 20cm, and each cell was measured once every 10}15d. One site was measured in each cell and the determination was made at a fixed point. Among them, the full-film double ridge planting test was repeated at random on the large ridge surface and small ridge surface to determine a single site, and sand film dual coverage was measured on the ridge surface. At the same time, the soil bulk density was measured by a ring knife method. Relatively speaking, using a quick soil moisture analyzer is quick and accurate.
The “heat increase theory†of mulching film in dry land indicates that mulching can significantly increase the soil temperature in the early growth stage of crops, and it can promote the early emergence of crops, seedlings, seedlings, and seedlings, and has a positive effect on drought and yield increase, and the warming effect of covering cultivation. Due to the different performances of field cover treatments, they have different daily and seasonal characteristics, as well as different soil depths, and thus have different effects on crop growth and development. The cultivation of plastic film mulching in dry land can slightly increase the surface soil moisture content, so that the water conditions for crop growth can be partially improved. However, due to the improvement of the hydrothermal conditions, the early growth of the crop, the large population, the developed root systems, and the deep root volume, increase the deep soil moisture. The consumption. The full-coverage ridge and furrow planting technology of the dry land covered the ground effectively and effectively blocked the ineffective evaporation of soil moisture. At the same time, the field's water-covering effect of the mulching film on the field collected the precipitation of the J-lOmm, which is difficult to use in the semi-arid area, to the root zone of the crop. The water content of 0-20 cm soil layer solved the contradiction of insufficient soil moisture in the critical period of crop water requirement for dry land crops, and increased the water satisfaction rate for the whole growth period of crops.
Based on the analysis of the hydrothermal conditions of the soil covered with dryland soils by a rapid soil moisture analyzer, it was found that the cultivation of dry land cover significantly increased the average temperature of the 0- 25cm soil layer in the seedling and tasseling stage of maize in the early growth period, and increased the temperature. The range is 1.43.60C. Among them, FMRFC treatment has the most obvious effect of warming, and its warming effect is mainly manifested in the early and late stages of corn growth and development, and its mid-term effect is small. In the early stage, the daily average temperature of 0-25cm soil layer can be increased by 3.1-3.30C, and the latter can be increased by 0.3. At 0.80C, the soil temperature showed a 'U' change during the whole growth period, and the increase in temperature could promote early germination, seedlings, seedlings, seedlings, and the resistance to stress.The dryland mulching and film cultivation improved the moisture conditions in the top layer of the soil. The soil moisture in the ~20cm layer can be recharged at the end of the rice growth period, and the water consumption of the maize growth and development is mainly concentrated in the 20-100cm soil layer.The FMRFC treatment significantly increases the water consumption of the crop compared to FSMC, SMC and CK. But it can make full use of deep soil moisture to meet crop growth needs.