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选择湖北省恩施州作为鄂西山区高山萝卜(Raphanus sativus Linn.)的代表性种植区域,探讨了高山萝卜的合理施氮量。结果表明,萝卜的生物量随着施氮量的增加呈抛物线增加趋势,当施氮量达到270 kg/hm2时萝卜的生物量最高;氮素表观利用率随着施氮量的增加而降低,而磷素和钾素表观利用率则随着施氮量的增加呈先升高后降低的趋势;施用适量氮肥可提高萝卜的VC含量,但当施氮量达到270 kg/hm2以上时VC含量明显降低;施用氮肥明显降低了萝卜的可溶性糖含量。综合考虑萝卜的生物量、品质和肥料利用率,在该研究条件下恩施市萝卜的适宜施氮量为210~270 kg/hm2。
Enshi Prefecture of Hubei Province was chosen as the representative planting area of Raphanus sativus Linn. In Hubei Province, and the reasonable nitrogen application rate of Alpine radish was discussed. The results showed that the biomass of radish showed a parabolic trend with the increase of nitrogen application. The biomass of radish was the highest when the nitrogen application reached 270 kg / hm2. The apparent nitrogen use efficiency decreased with the increase of nitrogen application , While the apparent utilization rate of phosphorus and potassium increased firstly and then decreased with the increase of nitrogen application rate. The application of appropriate amount of nitrogen fertilizer increased the VC content of radish, but when the nitrogen application rate reached 270 kg / hm2 or above VC content significantly reduced; application of nitrogen fertilizer significantly reduced the soluble sugar content of radish. Considering the biomass, quality and fertilizer utilization of radish, the appropriate nitrogen application rate of radish in Enshi was 210 ~ 270 kg / hm2.