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The fertilization management and remediation of the problem soils
|關鍵字:||農業化學類;技術發展;soil improvement;土壤改良;表土累積磷;磷肥利用率;強酸性土壤;鹼性土壤;石灰;硫磺;有機質肥料;鳳梨;accumulated phosphate in top soil;phosphorus fertilizers;Strongly acidic soil;Alkali soil;Lime;sulfur;Organic fertilizer;Pineapple||摘要:||
1. The technologies of using accumulated phosphate in top soil and incresing the efficiency of phosphorus fertilizers :
The strong phosphate (K) fixing capacities of strongly acidic acids and calcareous soils as well as broadcast application commonly result in high concentration of P in topsoils. Take advantages of correction technologies to dissolute and desorb fixed P, inprove P downward movement, increase P content in soil profile, will effectively use of accumulated P, reduce the amount of P fertilizer, therefore, it can increase the efficiency of P fertilizer use. The purposes of this 4-years study are to develop and evaluate the different correction practices on the utility of accumulated P of strongly acidic acids and calcareous soils.
2. Study on the Soil Management and Fertilization Technologies of Strongly Acidic and Alkali Pineapple Fields :
In Taiwan, farmers always cultivated pineapple at strong acid soil, there also little pineapple grown at alkali soil. Both of strong acid soil and alkali soil had plant nutrition management problem. Over used alkali organic fertilizer or lime material always resulted in negative effect of plant production and environmental quality. The purpose of this study is to research the rational fertilization technique for pineapple fields. The results will be a perfect guide for fertilization recommendation, therefore, not only the yields and qualities of crop can be increased, but also the environment pollution can be prevented.
|Appears in Collections:||土壤環境科學系|
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