不同灌水时间下毛竹伐桩根系化学计量及生理特性变化

doi:10.12302/j.issn.1000-2006.202010022

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南京林业大学学报（自然科学版） ›› 2021, Vol. 45 ›› Issue (5): 25-30.doi: 10.12302/j.issn.1000-2006.202010022

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不同灌水时间下毛竹伐桩根系化学计量及生理特性变化

张磊¹^,²(), 童龙³, 谢锦忠²^,^*(), 李俞佳¹, 张玮²

1. 重庆市忠县林业局, 重庆忠县 404300
2. 中国林业科学研究院亚热带林业研究所,浙江杭州 311400
3. 重庆市林业科学研究院, 重庆 400036

收稿日期:2020-10-16 接受日期:2021-02-20 出版日期:2021-09-30 发布日期:2021-09-30
通讯作者: 谢锦忠
基金资助:
中国林科院中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2017MA002)

Changes in chemical metrology and physiological characteristics of Phyllostachys edulis stump roots under different irrigation times

ZHANG Lei¹^,²(), TONG Long³, XIE Jinzhong²^,^*(), LI Yujia¹, ZHANG Wei²

1. Forestry Bureau of Zhongxian County, Chongqing, Zhongxian 404300,China
2. Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400,China
3. Chongqing Forestry Research Institute, Chongqing 400036,China

Received:2020-10-16 Accepted:2021-02-20 Online:2021-09-30 Published:2021-09-30
Contact: XIE Jinzhong

摘要/Abstract

摘要：

【目的】 研究不同灌水时间下毛竹伐桩根系化学计量及生理特性的差异,为毛竹伐桩灌溉时间长短的选择提供理论参考。【方法】 以毛竹灌水伐桩为研究对象,设置4个处理:对照灌水0 d(CK)、灌水180 d(T1)、灌水360 d(T2)、灌水720 d(T3),分析比较4个不同灌水时间长度后,毛竹伐桩根系化学计量、相对电导率、丙二醛(MDA)含量、根系活力、抗氧化酶活性及可溶性蛋白含量差异。【结果】 随着灌水时间的延长,毛竹伐桩根系碳(C)含量不断增加,而氮(N)和磷(P)的含量则基本均呈先升高后降低,m(C)/m(N)和m(C)/m(P)不断上升,m(N)/m(P)保持相对稳定。毛竹伐桩根系各种氧化酶活性、相对电导率和MDA含量均随着灌水时间的不断增加而升高,而毛竹伐桩根系活力和可溶性蛋白含量都随着灌水时间的增加明显降低。【结论】 综合各项生理指标认为,在360 d内对毛竹伐桩灌水仍能起到较好的灌溉效果。

关键词: 毛竹, 伐桩, 灌水时间, 根系, 化学计量, 生理特性

Abstract:

【Objective】 To provide a theoretical basis for selecting the irrigation time of Phyllostachys edulis stumps, the differences in chemical metrology and physiological characteristics of stump roots of P. edulis under different irrigation times were studied. 【Method】 The cutting pile of P. edulis stumps was taken as the research object. Four treatments were used: irrigation for 0 days (control, CK), irrigation for 180 days (T1), irrigation for 360 days (T2), and irrigation for 720 days (T3). The differences of root stoichiometry, relative conductivity, malondialdehyde (MDA) content, root activity, antioxidant enzyme activity, and soluble protein content in four stumps of P. edulis after different irrigation times were analyzed and compared.【Result】 The results showed that the content of carbon (C) in the roots of P. edulis stumps increased with increasing irrigation time, but the content of nitrogen (N) and phosphorus (P) increased first and then decreased; m(C)/m(N) and m(C)/m(P) increased continuously, and m(N)/m(P) remained relatively stable. The activities of various oxidases, relative conductivity, and MDA content of P. edulis stump roots increased with increasing irrigation years, while the activities and soluble protein contents of P. edulis stump roots decreased with increasing irrigation years. 【Conclusion】 According to the comprehensive physiological indexes, the results showed that the irrigation effect of P. edulis stumps was satisfactory within 360 days.

Key words: Phyllostachys edulis, stumps, irrigation time, root system, chemical metrology, physiological characteristics

中图分类号:

Q945.79

张磊,童龙,谢锦忠,等. 不同灌水时间下毛竹伐桩根系化学计量及生理特性变化[J]. 南京林业大学学报（自然科学版）, 2021, 45(5): 25-30.

ZHANG Lei, TONG Long, XIE Jinzhong, LI Yujia, ZHANG Wei. Changes in chemical metrology and physiological characteristics of Phyllostachys edulis stump roots under different irrigation times[J].Journal of Nanjing Forestry University (Natural Science Edition), 2021, 45(5): 25-30.DOI: 10.12302/j.issn.1000-2006.202010022.

图/表 4

表1

图1

图2

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处理 treatment	C含量/ (g·kg^-1) carbon content	N含量/ (g·kg^-1) nitrogen content	P含量/ (g·kg^-1) phosphorus content	m(C)/m(N)	m(C)/m(P)	m(N)/m(P)
CK	418.26±20.16 c	3.72±0.19 a	0.191±0.018 3 b	111.21±9.02 b	2 133.69±178.92 b	18.93±0.86 b
T1	473.17±30.67 b	4.05±0.15 a	0.281±0.014 1 a	118.19±10.01 b	1 692.76±111.34 c	14.69±0.85 c
T2	525.30±25.91 b	3.10±0.18 b	0.221±0.017 4 b	169.21±12.09 a	2 465.11±168.23 b	14.58±0.11 c
T3	571.69±10.01 a	3.22±0.11 b	0.153±0.008 7 c	184.36±13.23 a	3 951.92±201.21 a	22.02±1.02 a

不同灌水时间下毛竹伐桩根系化学计量及生理特性变化

Changes in chemical metrology and physiological characteristics of Phyllostachys edulis stump roots under different irrigation times

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