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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (7): 88-92.

所属专题： 烟草种植与生产

• 农学 农业基础科学 • 上一篇    下一篇

不同施镁水平对云南烤烟生长、产量及养分吸收的影响

曾睿 何忠俊 程智敏 向金友 合勐麟   

  • 收稿日期:2010-08-05 修回日期:2010-09-10 出版日期:2011-04-05 发布日期:2011-04-05

Effects of Different Magnesium Application Level on Growth,Yield and Nutrient absorption of Flue-cured Tobacco of Yunnan

  • Received:2010-08-05 Revised:2010-09-10 Online:2011-04-05 Published:2011-04-05

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摘要：

为研究不同供镁对云南烤烟生长、产量及养分吸收的影响，采用田间小区随机排列，设置5个镁水平（0、56.25、112.50、168.75、225.00 kg/hm2）。结果表明，施用镁肥提高了烟叶的产量、产值、均价和上等烟比例，且与对照之间的差异达到显著水平，烤烟产量、产值和上等烟比例以168.75 kg/hm2处理的施镁水平为最高。在56.25～112.5kg/hm2的施镁水平范围内有助于提高烟叶品质。施镁能提高烟叶中镁含量，且各叶位镁含量表现为：下部叶>中部叶>上部叶。施镁促进了烟叶对氮、磷、钾的吸收，缺镁或镁水平过高（≧225.00 kg/hm2）都不利于烤烟对氯养分的吸收。随施镁水平的增加，烟叶含Ca量逐渐降低。因此，从烤烟的农艺性状、经济性状、品质和养分吸收方面综合考虑，建议云南省优质烤烟合理的施镁水平在56.25~112.5 kg/hm2为宜。

关键词: 奶牛, 奶牛, 热应激蛋白, 温湿指数, 相关性

Abstract:

The experiment was conducted to study the effects of different magnesium application level on growth,yield and nutrient absorption of flue-cured tobacco in Yuxi city, Yunnan province. Field experiment was randomly divided different small field, which was setup five levels of magnesium 0, 56.25、112.50、168.75、225.00 kg/hm2. The results showed that magnesium application level could increase yield, output value and ratio of first grade of leaves and CK was statistically significant. When magnesium application level was168.75 kg/hm2, the highest yield, output value and proportion of superior grade of leaves could be gotten.The quality was improved with Mg application level being 56.25～112.5kg/hm2. magnesium application increased the Mg content in tobacco leaves. The order of Mg contents in leaves at different positions was lower>middle>upper. Mg expedited the absorption of N、P、K in tobacco leaves. when the Mg application level was either scarcity or too high(≧225.00 kg/hm2）there was no benefit for the Cl nutrient absorption. The Ca content in tobacco leaves decreased with the increasing of magnesium application levels. Comprehensively considering agronomic characters, economic characters,quality and nutrient absorption, the optimum Mg application level should be 56.25~112.5 kg/hm2 for high-quality flue-cured tobacco growth in Yuxi city, Yunnan province.