People gradually discovered during the planting process that people’s transitional demands led to the degradation of water and soil resources and the continuous reduction of crop productivity. The understanding of this problem has been continuously deepened in recent years, and systematically studied the large amount of water evaporation in farmland. The problem of reduced water use efficiency. In order to improve the soil moisture, prevent the spring drought, obtain ecological and economic benefits, the cultivation methods covered by no-tillage and stubble-free cultivation are continuously used in people's lives. No-tillage can increase soil moisture content, increase water use efficiency, and inhibit soil temperature shock. Through three-year field experiments, the effects of four types of no-tillage treatments on the changes of soil moisture in maize fields were studied to provide a theoretical basis for the zero-tillage maize coverage system in the semi-arid area of ​​the Yellow River Basin.
The experiment was conducted in Qingshuihe County, Inner Mongolia, in 2005. The county is located at longitude lllb39., north latitude 39b57. The soil of the sample is measured using a portable soil moisture thermogauge to obtain accurate comparative data. The test soil was chestnut brown soil, and the organic matter content was 9129g. The publicly-controlled alkaline nitrogen content was 2717mg/kg. The available phosphorus (Pz}s) content was 3182mg/kg. The available potassium (Kz0) content was 101mg/k. No-tillage and low-yield coverage (NLSD, no-tillage/high-sorghum-covered (NHS), no-tillage sorghum ((NH)) 4 treatments, compared to conventional tillage ((T) control, repeated 3 times. Tillage treatments were conducted once after harvesting and before sowing, with a tillage depth of 15 an. No tillage treatment was performed without stirring until the crops were harvested and before sowing. The soil was covered with stubble and straw before use, and 2VIB-5 type no-tillage sowing was used. The machine was sown with a sorghum height of 30 ang, a low sorghum height of 10 ang, a straw coverage of 6000 kg/h nz, and a straw coverage of more than 90%. During corn growth, temperature and moisture were recorded as follows: Observed daily changes in soil temperature (9:0Q12:0Q14:0Q18:0Q21:0Q0:0Q3:OQ 6:00); every 15}20c} measured at 9:00} 11:00 5,10,20,40, The soil temperature was 60 。m. The depth of soil moisture was measured with an aluminum box while the soil temperature was measured (0 1Q10-2Q20-4Q40-6Q60-8Q80100an).
Through the portable soil moisture temperature rapid measuring instrument to measure the soil moisture temperature of each sample and record the data to compare the study and found that one of the important factors affecting the soil water and heat changes is the use of land, the farmland covered with soil moisture conservation, regulation Ground temperature and other advantages. Compared to conventional tillage, no-tillage treatment can reduce temperature 2 3 3e when the soil temperature is highest during the day, and increase temperature 1 2 2e when the temperature reaches a minimum. The diurnal variation of soil temperature under stubble coverage was that the maximum soil temperature decreased day by day, the maximum temperature appeared later than conventional farming, and the daily variation amplitude decreased; the change law of night soil temperature was the opposite.
The experiment was conducted in Qingshuihe County, Inner Mongolia, in 2005. The county is located at longitude lllb39., north latitude 39b57. The soil of the sample is measured using a portable soil moisture thermogauge to obtain accurate comparative data. The test soil was chestnut brown soil, and the organic matter content was 9129g. The publicly-controlled alkaline nitrogen content was 2717mg/kg. The available phosphorus (Pz}s) content was 3182mg/kg. The available potassium (Kz0) content was 101mg/k. No-tillage and low-yield coverage (NLSD, no-tillage/high-sorghum-covered (NHS), no-tillage sorghum ((NH)) 4 treatments, compared to conventional tillage ((T) control, repeated 3 times. Tillage treatments were conducted once after harvesting and before sowing, with a tillage depth of 15 an. No tillage treatment was performed without stirring until the crops were harvested and before sowing. The soil was covered with stubble and straw before use, and 2VIB-5 type no-tillage sowing was used. The machine was sown with a sorghum height of 30 ang, a low sorghum height of 10 ang, a straw coverage of 6000 kg/h nz, and a straw coverage of more than 90%. During corn growth, temperature and moisture were recorded as follows: Observed daily changes in soil temperature (9:0Q12:0Q14:0Q18:0Q21:0Q0:0Q3:OQ 6:00); every 15}20c} measured at 9:00} 11:00 5,10,20,40, The soil temperature was 60 。m. The depth of soil moisture was measured with an aluminum box while the soil temperature was measured (0 1Q10-2Q20-4Q40-6Q60-8Q80100an).
Through the portable soil moisture temperature rapid measuring instrument to measure the soil moisture temperature of each sample and record the data to compare the study and found that one of the important factors affecting the soil water and heat changes is the use of land, the farmland covered with soil moisture conservation, regulation Ground temperature and other advantages. Compared to conventional tillage, no-tillage treatment can reduce temperature 2 3 3e when the soil temperature is highest during the day, and increase temperature 1 2 2e when the temperature reaches a minimum. The diurnal variation of soil temperature under stubble coverage was that the maximum soil temperature decreased day by day, the maximum temperature appeared later than conventional farming, and the daily variation amplitude decreased; the change law of night soil temperature was the opposite.
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