Soil Fertility Of Different Fertilization Systems And Its Effect On Crop Yield And Quality

Based on long-term location and different fertilization systems in the"Beijing Fluvo-acqic Soil Fertility and Fertilizer Efficiency Long TermMonitoring Base(BFSFFELTMB)", the research explored the soil fertilitycharacteristic and its effect on crop's yield and quality. The main results is asfollows:1 Long-term unbalanced fertilization or fertilizer absence can increase soildensit and decrease porosity and aeration of soil so worsen soil physicalcondition. Long-term balanced fertilization or chemistry fertilizationcombined with organic fertilizer can decrease the soil density and increase theporosity and aeration of soil ,so improve the soil's physic and fertilitycondition. Especially chemistry fertilization combined with organic fertilizerhas a prominently positive effect on soil's physic and fertility condition.2 Long-term fertilizer absences decrease the organic matter content and humuscontent and heavy humus in soil. Long-term unbalanced fertilization also canincrease lightly these matters's content in soil. Longer-termbalanced-fertilization and chemistry fertilization combined with organicfertilizer can increase remarkably these matter's content in soil.3 Long-term fertilizer absence can decrease the content of humic acid andloose combined humus in soil, Humic acid –fulvic acid ratio (HA/FA) andloose combined humus-tight combined humus ratio. Long-term fertilizationespecially chemistry fertilization combined with organic fertilizer can increaseprominently Humic acid and loose combined humus content in soil and Humicacid –fulvic acid ratio (HA/FA) and loose combined humus-tight combinedhumus ratio so improve the quality of humus and organic matter's activationand update.4 Long-term N-fertilizer absence or only-N fertilization remarkably decreasetotal N and available N content. Long-term N, P, K chemistry fertilizer...