| Huang-huai-hai plain is the important food producing area in our country,but the lack of agricultural water resources seriously restrict the local agricultural sustainable development,cultivation as one of the important measures for water-saving agriculture,to distinguish different cropping patterns on wheat maize anniversary of farmland water balance,the influence of the construction of high production and efficiency of agricultural production system improve the efficiency of agricultural water is of great significance to realize agricultural sustainable development.In this experiment,three tillage modes of winter wheat continuous deep tillage summer maize no-tillage treatment(DT),winter wheat no-tillage two years deep tillage summer maize no-tillage(RT),winter wheat continuous no-tillage summer maize no-tillage(NT)were set.The experiment was carried out in 2018-2019.The soil water storage,soil evaporation,crop transpiration,runoff,leakage,water uptake,yield and water use efficiency of wheat and jade rotation farmland were studied by combining field experiment and model simulation.Soil parameters,crop parameters and meteorological parameters required by the model were measured by field and laboratory experiments.The field observation data of winter wheat and maize in 2018 were used for simulation,and the field observation data of wheat and maize in 2019 were verified.The main results were as follows:(1)Winter wheat summer corn rotation treatment and no-till treatment in 40-100 cm soil soil moisture content is higher than deep tillage treatment;The soil water storage in winter wheat from flowering period to grout period was significantly improved by 2.60%to 9.10%in the deep tilling treatment,and the amount of soil storage in summer corn after winter wheat no-till treatment was significantly higher than that of deep tillage treatment from 4.50%to 22.00%.The amount of winter wheat storage decreased gradually with the advancement of the fertility period,and the amount of water stored in summer corn soil decreased first and then increased with the advancement of the fertility period.(2)During the different fertility period of winter wheat,the rotation treatment increased the amount of crop evapotranspiration from the extraction period to the grout period,effectively reducing the amount of soil evaporation.The evaporation of deep tilling treatment winter wheat during fertility period under different farming methods increased by 8.00%to 14.33%during the whole fertility period compared with the rotation treatment,and by 3.54%to 6.69%compared to the no-till treatment;5.82%to 6.02%,3.66%to 8.76%higher than the no-till treatment,and 4.52%to 6.34%more steaming during the winter wheat birth period,2.96%to 6.34%higher than the no-till treatment.10.95 percent;evaporation during summer corn fertility after deep tilling treatment of winter wheat increased by 6.18%to 11.01%compared to rotation treatment,and evaporation during summer corn fertility after winter wheat no-till treatment increased by 5.65%to 9.9%compared to rotation treatment.56%;Summer corn after winter wheat round tilling treatment increased by 10.57%to 20.63%compared to deep tilling root system,and summer corn after winter wheat no-till treatment was 6.73%to 16.06%higher than deep tilling treatment.The amount of evapotranspiration during the summer corn fertility period after winter wheat rotation treatment was increased by 7.55%to 17.36%compared with the deep tilling treatment,and the amount of steaming during the summer corn fertility period after the no-till treatment was 12.77%to 13.01%.Winter wheat summer corn rotation for deep tilling treatment and the annual evaporation of the rotation treatment increased by 6.97%to 12.60%,the annual evapotranspiration volume of the more deep tilling treatment crops increased by 5.58%to 10.82%,and the annual root system water absorption increased by 7.79%to 10.87%.(3)The winter wheat no-till treatment of winter wheat with out-of-till treatment of thousands of grains and rotation treatment significantly increased by 13.69%to 17.33%and 13.39%to 15.69%,respectively;Treatment increased significantly by 5.13%to 8.30%,the yield of winter wheat with no-till treatment was significantly higher than that of deep tilling treatment by 5.77%to 11.70%,and the water utilization efficiency of winter wheat for no-till treatment was significantly increased by 6.28%to 13.83%compared to the rotation treatment.The yield of summer corn after winter wheat wheel farming was significantly higher than that of deep tilling treatment by 2.45%to 3.44%,while the water utilization efficiency was significantly higher than that of no-till treatment by 1.59%to 5.01%. |
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