Experimental Study On Soil Fertility Of Green And Fertilizer Rape In Ningxia Yellow River Irrigation District

Aiming at the single planting mode of green manure and rapeseed in Ningxia Yellow River Irrigation District,single no-till rape pattern and soil fertility,the experiment was conducted with Huayouza 62 as the test material to study the yield of spring rice and rapeseed on rice,com field yield and soil.The effect of fertility showed that the growth period of rapeseed in corm field was about 60 days,and the growth of rapeseed was about 1000kg/mu.Before planting corn,it was used as green manure to promote corn growth.The soil nutrient content in the green manure turning area was higher than that in the idle area.The rice field has a growth period of about 50 days in spring,and the average biomass of rapeseed is about 609kg/mu.Before planting rice,it is used as green manure.The average yield of rice after harvesting is 32.7kg/mu,which is 5.45%higher than that in the leisure area.Effects of different sowing rates on the yield of no-tillage rapeseed and soil fertility.The results showed that the yield difference of no-tillage rapeseed before and after irrigation was not obvious,but the seeding rate was 1.5kg/mu.Compared with the pre-test ground strength,the CK treatment of rapeseed increased soil organic matter content by 18.6%-36.13%;the alkali nitrogen content increased by 54.48%-63.87%;the available phosphorus content increased by 45.48%-61.16%;the available potassium content increased by 5.45%.The effect of different sowing on the bulk density and soil porosity of no-tillage soil.The results showed that the difference of soil bulk density and soil porosity before and after irrigation was not obvious.Before and after irrigation,with the increase of seeding amount,the soil bulk density of 0-20cm could be significantly reduced and the soil porosity of 0-20cm could be improved.Comprehensive analysis,the best effect on the fertilization of rapeseed before irrigation.The effect of the proportion of base nitrogen fertilizer on the yield of rapeseed and the growth and development of rapeseed.The results showed that the yield of rapeseed was the highest after the seedling stage treatment,and the yield per mu reached 4889.1kg/mu.In the bud stage,the yield of rapeseed reached 4478.0kg/mu,which was 413.1kg/mu lower than that of seedling stage,indicating that the yield of rapeseed was higher during seedling stage.The appearance of the rapeseed plants changed with the increase of plant height,stem diameter and leaf area.The effect of nitrogen-based fertilizer treatment on the absorption and accumulation of N,P and K in rapeseed.The results showed that the total nitrogen content varied from 4.10%to 5.46%,reached the highest value in about 45 days,and the maximum nitrogen accumulation in treatment 2 was 0.59 g/plant.The total phosphorus content of treatment 3 was 0.64%,the accumulation of P2O5 was the highest in about 70 days,and the cumulative amount of P2O5 in treatment 2 was 0.57 g/plant.The cumulative amount of K2O in Treatment 3 was at most 0.69 g/plant.The nutrient uptake of nitrogen,phosphorus and potassium in the growth stage of rapeseed showed an increasing trend.