施肥对华北落叶松人工林根茎叶中氮磷含量的影响

doi:10.11707/j.1001-7488.20140320

Abstract

Abstract:

A field experiment was conducted to study the effects of fertilization on N and P content of roots, stems and leaves of 20-year-old Larix principis-rupprechtii in a plantation in western Qinling mountain. The results showed that N and P fertilization significantly increased N and P content in the roots, stems and leaves. The N and P content increased largest with the application of 15 g·m^-2 N and 7.5 g·m^-2 P₂O₅. For unfertilized L. principis-rupprechtii, the N and P content in leaves was relatively higher at early growth stage, and then declined and fluctuated, and reached to the lowest value in October. As for in stems, the N and P content increased gradually, and reached to the highest value in September and then declined in October. The N content in roots reduced firstly and reached to the lowest in June, and then exhibited an increase trend. The P content in stems was relatively stable, and the highest value was in August. The tree growth was restricted by the shortage of soil nutrient. N fertilizer and P fertilizer should timely be supplemented in this place to meet the nutritional needs of the normal growth of L. principis-rupprechtii.

Key words: fertilization, Larix principis-rupprechtii, nitrogen content, phosphorus content, nutrient

CLC Number:

S753.53

Xu Fuli, Zhao Yafang, Zhang Pan, Wang Weiling, Yu Qinmin, Wang Weidong, Wang Guoxing. Effects of Fertilization on Nitrogen and Phosphorus Content in Roots, Stems and Leaves of Larix principis-rupprechtii Plantation[J]. Scientia Silvae Sinicae, 2014, 50(3): 139-143.

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Effects of Fertilization on Nitrogen and Phosphorus Content in Roots, Stems and Leaves of Larix principis-rupprechtii Plantation

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