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

doi:10.12302/j.issn.1000-2006.202010022

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (5): 25-30.doi: 10.12302/j.issn.1000-2006.202010022

Special Issue: 专题报道

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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 E-mail:zhangleilx2010@163.com;jzhxie@163.net

Abstract

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

CLC Number:

Q945.79

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, 2021, 45(5): 25-30.

Figures/Tables 4

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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

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

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