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Effects of soil warming and nitrogen fertilization on leaf physiology of Pinus tabulaeformis seedlings

机译：土壤升温和氮肥对油松幼苗叶片生理的影响

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摘要

The paper mainly studied the short-term influences of experimental warming, nitrogen addition, and their combination on physiological performance of P. tabulaeformis seedlings. Free air temperature increase system of infrared heaters was used to raise monthly average soil and air temperature by 2.6 and 2.1 A degrees C above the ambient. NH4NO3 solution was added for a total equivalent to 25 g N m(-2) a(-1). Experimental warming and nitrogen addition induced a significant increase in leaf nitrogen concentration, A (max), I broken vertical bar, antioxidant enzymes activities, ASA and free proline contents, but both of them sharply decreased AOS and MDA level. Interestingly, the interaction of warming and nitrogen fertilization further improved leaf nitrogen concentration, A (max), I broken vertical bar, and antioxidant compounds accumulation, and also resulted in lower rate of O-2 (-) production than either single warming or fertilization. Obviously, the beneficial effects of warming and N fertilization alone on leaf physiology of P. tabulaeformis seedlings were magnified by the combination.
机译：本文主要研究了试验升温，氮素添加及其组合对油松幼苗幼苗生理性能的短期影响。红外加热器的自由空气温度升高系统用于使土壤和空气的月平均温度比周围环境升高2.6和2.1 A摄氏度。加入NH4NO3溶液，其总量相当于25 g N m（-2）a（-1）。实验性增温和氮添加导致叶片氮浓度，A（最大值），垂直条断裂，抗氧化酶活性，ASA和游离脯氨酸含量显着增加，但两者均显着降低了AOS和MDA含量。有趣的是，加温和施氮的相互作用进一步改善了叶片氮浓度，A（max），I竖条断裂和抗氧化剂化合物的积累，并且与单加温或施肥相比，还降低了O-2（-）的产生速率。显然，单独加温和施氮对油松假单胞菌幼苗叶片生理的有益影响被组合放大了。

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    Zhao Chunzhang; Liu Qing;

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  • 年度 2012
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