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长期不施钾肥对甘薯产量的影响
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摘要:
利用黄潮土肥料长期定位试验,研究长期不施钾肥对甘薯产量的影响。结果表明,长期不施钾肥,薯块膨大期迟后、日增重减少,导致鲜薯产量下降;与施钾处理相比,不施钾可提高薯块干物质含量,而单位面积干物质产量明显下降;长期不施钾肥条件下,不同甘薯品种的产量反应存在显著差异,以此筛选出高耐低钾力品种徐薯18、钾高效型品种徐薯25-2和钾敏感型品种苏薯7,可为品种选育和生产应用提供材料。
关键词:  定位试验  钾肥  甘薯  产量  
DOI:
基金项目:国家公益性行业(农业)科研专项经费项目(nyhyzx07-012);;徐州甘薯国家野外科学观测试验站部分研究内容(2005 DK A103002007-2008)共同资助
Effects of long-term non K fertilizer application on the sweetpotato yield
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Abstract:
Effects of long-term non K fertilizer usage on the sweetpotato yield were studied by long-term stationary field experiment in yellow fluvo-aquic soil.The results showed that the long-term non K fertilizer treatment would delay the swelling period of sweetpotato storage root and reduce daily output,so as to cause the drop of fresh root yield.Compared with application of K fertilizer,non K fertilizer usage could increase the dry matter content of storage root,but the total output of dry matter in unit area wo...
Key words:  stationary experiment  K fertilizer  sweetpotato  yield  

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