| Wheat is one of the main grain crops in Weibei dryland area,but there is a widespread problem of excessive fertilization in its planting process.The large-scale application of chemical fertilizers isn’t solely a waste of resources,however conjointly a significant pollution to the surroundings,leading to raised greenhouse emission emissions,excessive nitrate content in groundwater and eutrophication of surface water.Therefore,guaranteeing the rational use of chemical fertilizers within the method of agricultural production and realizing the resource utilization of agricultural wastes area unit necessary ways in which to comprehend the property development of recent inexperienced agriculture.The main factors limiting crop yield in Weibei dryland area are poor soil and lack of water.At present,the results of previous studies show that the watching fertilization technology will effectively scale back the number of plant food application whereas making certain the yield,that not solely reduces the assembly value of farmers and improves the economic edges of farmers,however additionally protects the ecological surroundings.In addition,agricultural waste can be prepared into biochar and organic fertilizer.Combined application of organic fertilizer and biochar in farmland can effectively improve soil fertility and soil quality.Therefore,combined application of organic fertilizer and biochar under monitoring fertilization technology can effectively solve the problems of excessive fertilizer application and’dry’and’thin’soil in Weibei dryland.Therefore,this study used the method of integrated analysis to explore the effects of biochar application on wheat yield and soil nutrients under different conditions by collecting published data.In the second experiment,wheat variety Luohan 6 was used as the research object.Single factor design was used to compare the effects of monitoring fertilization,farmer fertilization,monitoring nitrogen deficiency,monitoring phosphorus deficiency and monitoring potassium deficiency on wheat yield and soil quality.Experiment 3 used split plot design to explore the effects of organic fertilizer and biochar on wheat yield and soil quality under controlled fertilization.The main results were as follows:(1)Reasonable application of biochar can significantly improve soil nutrient availability and increase wheat yield.The optimal application amount of biochar in wheat production was10～25 t/hm~2.Biochar prepared from woody materials should be preferred.The optimal p H value of biochar was 7～8.The effect of biochar production lasted for two years.(2)Monitoring fertilization technology is a green,healthy and sustainable technical scheme.On the basis of reducing nitrogen by 30%and phosphorus by 43%,there was no difference in wheat yield between the monitoring fertilization treatment and the farmer fertilization treatment.Monitoring fertilization can effectively save fertilizer resources,reduce wheat production costs,improve farmers’benefits,and reduce the risk of environmental pollution.Adequate and adequate nutrient supply is needed in wheat production.On the basis of monitoring the total nutrient supply of fertilization,wheat yield,aboveground biomass and nutrient accumulation were significantly higher than those of deficiency treatment.(3)On the idea of observance fertilization,combined application of organic and biochar had no vital impact on the yield increase of wheat within the 1st season,however had vital impact on the yield increase of wheat within the second season.and therefore the impact of organic treatment is healthier than organic.Combined application of organic fertilizer and biochar had significant effect on nitrogen and phosphorus absorption and utilization of wheat in the first season,but had no significant effect on potassium absorption and utilization efficiency of wheat in the first season,and significantly improved the potassium absorption and utilization efficiency of wheat in the second season.Continuous application of organic fertilizer and biochar will continuously increase the nutrient absorption and utilization efficiency of wheat.Application of organic fertilizer and biochar can improve the partial productivity of nitrogen,phosphorus,potassium fertilizer.The effects of continuous application of organic fertilizer and biochar for two seasons on soil organic matter and total nitrogen were not significant.Application of organic fertilizer and biochar slightly increased soil available nutrients in the first season,but the increase was not significant.Continuous application of 2 seasons had a big increase in soil out there phosphorus and out there metallic element,and therefore the increase of soil out there metallic element by biochar was over that by organic fertiliser,and therefore the increase of soil out there phosphorus by organic fertiliser was over that by biochar.the appliance of biochar and organic fertiliser might considerably cut back the residual nitrate gas in 0～200 cm soil.The result of biochar application was higher than that of organic fertiliser application. |
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