赵书军, 袁家富, 张新然, 徐祥玉, 熊又升, 秦兴成. 鄂西南烟区土壤供氮特性影响因素研究[J]. 中国生态农业学报(中英文), 2010, 18(6): 1157-1162. DOI: 10.3724/SP.J.1011.2010.01157
引用本文: 赵书军, 袁家富, 张新然, 徐祥玉, 熊又升, 秦兴成. 鄂西南烟区土壤供氮特性影响因素研究[J]. 中国生态农业学报(中英文), 2010, 18(6): 1157-1162. DOI: 10.3724/SP.J.1011.2010.01157
ZHAO Shu-Jun, YUAN Jia-Fu, ZHANG Xin-Ran, XU Xiang-Yu, XIONG You-Sheng, QIN Xing-Cheng. Factors affecting soil nitrogen supply in tobacco fields in Southwest Hubei[J]. Chinese Journal of Eco-Agriculture, 2010, 18(6): 1157-1162. DOI: 10.3724/SP.J.1011.2010.01157
Citation: ZHAO Shu-Jun, YUAN Jia-Fu, ZHANG Xin-Ran, XU Xiang-Yu, XIONG You-Sheng, QIN Xing-Cheng. Factors affecting soil nitrogen supply in tobacco fields in Southwest Hubei[J]. Chinese Journal of Eco-Agriculture, 2010, 18(6): 1157-1162. DOI: 10.3724/SP.J.1011.2010.01157

鄂西南烟区土壤供氮特性影响因素研究

Factors affecting soil nitrogen supply in tobacco fields in Southwest Hubei

  • 摘要: 采用田间高频次取样方法, 以不种植烤烟和不施肥土壤为对照, 结合试验年份湖北省恩施州宣恩县城的气象资料, 研究了气候因子、栽培和施肥等措施对宣恩县椒园镇烤烟土壤供氮特性的影响。结果表明: 土壤碱解氮含量随气温上升而增加、随降雨量增加而降低, 但一般比降雨时间滞后5~10 d; 未覆膜条件下施肥可在短期内(45 d左右)明显增加土壤碱解氮含量; 有机无机配合施肥烟株对氮的吸收大于纯施化肥; 在烟叶生长的后期, 有机无机配合施肥土壤碱解氮含量与单施化肥相比有降低趋势, 因此有机无机配合施肥是调控烤烟后期氮素营养的有效措施。各因素对土壤碱解氮含量影响大小的次序为: 栽培>施肥>气候, 作物吸收、地膜覆盖等栽培因素是影响土壤碱解氮含量的最主要因子之一。

     

    Abstract: In order to understand the effects of fertilization, planting and climate on soil N supply, field trials were conducted in Jiaoyuan Town, Xuan’en County with high frequent sampling of the field trial plots. Zero-tobacco planting and zero-fertilization were used as the control (CK) in the experiment. In the trials, rainfall and air temperature came from Enshi Meteorological Agency. Results show that soil alkali-hydrolysis N content increases with increasing air temperature, but decreases with increasing rainfall; generally lagging behind rainfall by 5~10 days. For a period of about 45 days, soil alkali-hydrolysis N content significantly increases under fertilization with no plastic film cover. Under combined organic and chemical fertilization, soil alkali-hydrolysis N supply improves in mid- to late-growth stages of tobacco. This is therefore an effective way of regulating N supply during later growth stage of tobacco. The order of significance of the factors affecting soil alkali-hydrolysis N content is planting > fertilization > climate. Cultivation factors such as crop absorption, film mulching are the main factors affecting soil alkali-hydrolysis N content.

     

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