Nitrogen Nutrition in Sprouting Buds from Chinese Fir Stumps

Cheng Shuwnn; Wang Gaiping; Ding Guohua; Ye Jingzhong

Volume 12 Issue 2

May 2019

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Cheng Shuwnn, Wang Gaiping, Ding Guohua, Ye Jingzhong. Nitrogen Nutrition in Sprouting Buds from Chinese Fir Stumps[J]. Journal of Zhejiang A&F University, 1995, 12(2): 133-138.

Citation:

Cheng Shuwnn, Wang Gaiping, Ding Guohua, Ye Jingzhong. Nitrogen Nutrition in Sprouting Buds from Chinese Fir Stumps[J]. Journal of Zhejiang A&F University, 1995, 12(2): 133-138.

Nitrogen Nutrition in Sprouting Buds from Chinese Fir Stumps

1.
Nanjing Forestry University, Nanjing 210037, PRC

Received Date: 1994-12-06
Publish Date: 1995-06-30

Abstract

In the northern subtropics of China, in a 28-year-old Chinese fir stand grown on yellow-brown soil, 5 treatments of various cutting seasons were established to study the differences in nitrogen nutrition, endohormones, sprouting amount and growth rate of the sprouting dormant buds from Chinese fir stumps. It turned out that winter cut (Dec. 8 of last year) and early spring cut (Mar.8 of the current year) were the optiaml cutting seasons by which the sprouting amount from a stump, the N nutrition Ievel in the sprouting buds and the growth rate of sprouts were the highest. Sprouting amount per stump was closely related to CTK level in sprouting buds, while the difference of N nutrition in the sprouting buds from various stumps was mainly attributed to the translocation of N nutrients within the tree, especially the downward reflux of reductive N to the basal Part of stem and root system. The ring-barking experiment further proved this inference. Therefore, the concentrations of total N and amino N in the sprouting buds can be adopted as the physiological indice for demonstrating the optimal cutting season and predicting the growth rate of sprouting.
- Cunninghamia lanceolata (Chinese fir),
- stump,
- sprout tillers,
- nitrogen nutrition,
- phytohormones

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Nitrogen Nutrition in Sprouting Buds from Chinese Fir Stumps

1. Nanjing Forestry University, Nanjing 210037, PRC

Received Date: 1994-12-06

Publish Date: 1995-06-30

Key words:

Abstract: In the northern subtropics of China, in a 28-year-old Chinese fir stand grown on yellow-brown soil, 5 treatments of various cutting seasons were established to study the differences in nitrogen nutrition, endohormones, sprouting amount and growth rate of the sprouting dormant buds from Chinese fir stumps. It turned out that winter cut (Dec. 8 of last year) and early spring cut (Mar.8 of the current year) were the optiaml cutting seasons by which the sprouting amount from a stump, the N nutrition Ievel in the sprouting buds and the growth rate of sprouts were the highest. Sprouting amount per stump was closely related to CTK level in sprouting buds, while the difference of N nutrition in the sprouting buds from various stumps was mainly attributed to the translocation of N nutrients within the tree, especially the downward reflux of reductive N to the basal Part of stem and root system. The ring-barking experiment further proved this inference. Therefore, the concentrations of total N and amino N in the sprouting buds can be adopted as the physiological indice for demonstrating the optimal cutting season and predicting the growth rate of sprouting.

Nitrogen Nutrition in Sprouting Buds from Chinese Fir Stumps

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Related

Proportional views