| With the combined effect of increasing population and a series of non sustainabledevelopment factors, red soil area of our country is faced with a series of major ecologicaland environmental problems, such as soil erosion, soil fertility decline and seasonaldrought occurred frequently, resulting in degradation of produce. Therefore, the dynamicchanges of soil fertility and nutrient resources to clarify in red upland crop uptake andutilization is an important problem in agricultural science characteristics, for the protectionof the ecological environment and agricultural sustainable development, have importanttheory meaning and practice value.This paper was based on long-term fertilization experiment in red soil of jiangxiinstitute of red soil whichwas from1986. The soil fertility, corn yield and nutrient balancewere analysed from1986to2010. The results and conclusions were as follows:1In upland red soil, fertilizer and organic manure enhanced effect on maize yield thebest. In25years, NPKM treatment than CK increased by an average of568.8%, comparedwith an increase of53.6%in OM,45.1%higher than NPK.2In upland red soil, chemical fertilizer and organic fertilizer application could notimprove the soil total potassium content, soil total potassium show exhaustion trend. Butchemical fertilizer or organic fertilizer could improve soil available potassium content, soilavailable potassium showed accumulation trends.3In upland red soil, nitrogen recovery of N treatment was the lowest, phosphorusrecovery P treatment was the lowest, the lowest rate of fertilizer K treatment. In25years,NK, NPK, HNPK respectively, N increased by592.5%,452.9%and521.1%. NP, NPK,HNPK respectively, P increased by203.8%,374.8%and413.7%. NK, NPK, HNPKrespectively, K increased by313.3%,494.3%and296.5%.To sum up, Balanced fertilization is conducive to high yield, but also conducive to theabsorption of crops and the nutrient accumulation, fertilizing effect is good; the balancedapplication of chemical fertilizers, to maintain crop high yield, soil nutrient content andtest of difference; fertilizers with organic fertilizer, soil fertility, crop nutrient uptake andcrop yield were the highest, shows whether to raise the utilization rate is high and stableyield from the aspect of nutrient, fertilizer and organic fertilizer is the sustainable mode offertilization in red soil upland．... |
