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当前位置: 首页 > 文章 > 施氮量对鲜食型甘薯产量、品质及氮素利用的影响 华北农学报 2014,29 (6) 189-194
Position: Home > Articles > Effects of Nitrogen Application on Yield,Quality and Nitrogen Utilization of Fresh-eating Sweet Potato Acta Agriculturae Boreali-Sinica 2014,29 (6) 189-194

施氮量对鲜食型甘薯产量、品质及氮素利用的影响

作  者：
高璐阳;房增国;史衍玺
单  位：
青岛农业大学
关键词：
氮肥;鲜食型甘薯;产量;品质;氮素利用
摘  要：
探讨施氮量对甘薯产量、品质及氮素利用的影响,为甘薯氮肥管理提供理论参考。以鲜食型甘薯(龙薯9和烟薯25)为试材,通过盆栽试验研究了不同施氮量对鲜食型甘薯生物学指标、产量、品质及氮素利用的影响。结果表明,鲜食型甘薯的蔓长、分枝数、节间长度、叶柄长和叶宽等生物学指标均随施氮量的增加而增加。适当增施氮肥可显著提高薯块产量、商品薯率和单株薯块数。适量的氮肥可显著提高薯块中可溶性糖和Vc含量,薯块中可溶性蛋白、粗蛋白以及硝酸盐含量均随施氮量的增加而增加。通过二次曲线模拟可知:龙薯9和烟薯25的最高产量施氮量分别为166.60,153.13 mg/kg。甘薯的氮素积累量随施氮量的增加而增加,氮素吸收效率和氮素利用效率均随施氮量的增加而下降,且品种间氮素吸收效率表现为短蔓品种(龙薯9)小于长蔓品种(烟薯25),氮素利用效率表现为短蔓品种(龙薯9)大于长蔓品种(烟薯25)。减少氮肥施用量可显著提高甘薯氮肥利用率。
译  名：
Effects of Nitrogen Application on Yield,Quality and Nitrogen Utilization of Fresh-eating Sweet Potato
作  者：
GAO Lu-yang;FANG Zeng-guo;SHI Yan-xi;College of Resources and Environment,Qingdao Agricultural University;Kingenta Ecological Engineering Group Co. ,Ltd.;
关键词：
Nitrogen;;Fresh-eating sweet potato;;Yield;;Quality;;Nitrogen utilization
摘  要：
To investigate the effects of nitrogen application on yield,quality and nitrogen utilization of sweet potato to provide a theoretical reference for the sweet potato nitrogen management. The effects of nitrogen application on biological index,yield,quality and nitrogen utilization have been studied in the pot experiment. The cultivar of fresh-eating sweet potatos( Longshu 9 and Yanshu 25) were selected as experimental materials. The results showed that the biological index such as vine length,branch number,length of internode,petiole length and so on were increased with the increase of nitrogen application. Appropriate nitrogen application could significantly increase the tuber yield,commodity rate and tuber number of per plant,and increase the tuber soluble sugar and Vc content. The tuber soluble protein,crude protein and nitrate content increased with the increase of nitrogen application. Simulated by a quadratic curve: the yields of fresh-eating sweet potato reach their maxima under 166. 60 mg / kg( Longshu 9)and 153. 13 mg / kg( Yanshu 25). The nitrogen accumulation increased with the increase of nitrogen application,nitrogen uptake efficiency and nitrogen use efficiency decreased with the increase of nitrogen application,the difference of cultivars on nitrogen uptake efficiency showed that short vine cultivar( Longshu 9) less than long vine cultivar( Yanshu 25),but the difference of cultivars on nitrogen use efficiency showed that short vine cultivar( Longshu9) more than long vine cultivar( Yanshu 25). Reduce nitrogen application could increase the nitrogen use efficiency of fresh-eating sweet potato significantly.

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