A study on the ecological control of red blight of Metasequoia glyptostroboides by integrated forest management

doi:10.12302/j.issn.1000-2006.202007069

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (6): 90-98.doi: 10.12302/j.issn.1000-2006.202007069

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A study on the ecological control of red blight of Metasequoia glyptostroboides by integrated forest management

YANG Yi¹^,²(), LIU Bo³, YE Jianren¹^,^*(), SU Luhui³

1. College of Forestry, Nanjing Forestry University, Nanjing 210037, China
2. Shanghai Pudong New Area Road Administrative Department, Shanghai 200129,China
3. Shanghai Pharmaceutical School, Shanghai 200135,China

Received:2020-07-31 Accepted:2021-01-13 Online:2021-11-30 Published:2021-12-02
Contact: YE Jianren E-mail:yangyifa@126.com;jrye@njfu.edu.cn

Abstract

Abstract:

Red blight of Metasequoia glyptostroboides is a typical host-dominated disease. The ecological regulation is one of the best control strategies for this disease, and forestry technology is a basic and fundamental control measure of ecological regulation.Therefore, studying the forest management and control measures could scientifically improve the control strategies for red blight of M. glyptostroboides.【Method】Pure and mixed M. glyptostroboides forests in the green belt were selected, and single factor forest management measures such as thinning, pruning, cleaning, fertilization, soil loosen and the transformation of the pure forest into the mixed forest were used to carry out experiments respectively. In addition, the pure M. glyptostroboides forest was selected to carry out the randomized block-group comprehensive control test of multi factor forest management measures. The control effects of forest management measures on red blight were calculated and analyzed.【Result】 This study showed that the disease index of red blight of M. glyptostroboides decreased to different degrees by thinning and tree density adjustment or the timely clearing of fallen leaves and dead tree stumps or loose soil. Mild pruning had a certain effect on reducing the disease index, but the disease index did not change after moderate pruning. After severe pruning, the disease index of red blight increased, and the incidence and disease index of red blight increased to different degrees after applying nitrogen fertilizer alone. The incidence and disease index were significantly reduced after the application of phosphate and potassium fertilizers. After N, P and K fertilizers were applied, the incidence and disease index decreased but were not significant. After the transformation of the M. glyptostroboides pure forest into the mixed forest, the disease index was significantly reduced. According to the results of the randomized block design of the integrated silvicultural trial, the primary and secondary relationship of the influence on the decline rate of the disease index was: forest transformation > forest health > fertilization > tending. The optimal combination level of integrated silvicultural measures was forest cleaning once + light pruning ventilation + loosening the soil and digging deep + weeding + fertilizing with calcium phosphate and potassium chloride + the transformation of the pure forest into the mixed forest. 【Conclusion】 The reasonable silvicultural measures can control the occurrence and harm of red blight in M. glyptostroboides, and the integrated forest management can be applied to collaborative ecological control effects.

Key words: Metasequoia glyptostroboides, red blight of M. glyptostroboides, silvicultural control, ecological regulation

CLC Number:

S763.15

YANG Yi, LIU Bo, YE Jianren, SU Luhui. A study on the ecological control of red blight of Metasequoia glyptostroboides by integrated forest management[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2021, 45(6): 90-98.

Figures/Tables 4

Table 1

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Table 3

Table 4

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水平 level	因子 factor
水平 level	林间卫生(A) forest health	抚育(B) tending	施肥(C) fertilization	林相改造(D) forest transformation
1	不清扫	轻修剪通风(B₁)	不施肥	纯林不变
2	清扫1次	B1+松土深翻(B₂)	施尿素	纯林抽稀
3	清扫2次	B₂+除草	施过磷酸钙+氯化钾	纯林改混交林

营林措施 forest management	处理 treatment	纯林 pure forest		混交林 mixed forest
营林措施 forest management	处理 treatment	平均发病率/% average incidence rate	平均病情指数 average disease index	平均发病率/% average incidence rate	平均病情指数 average disease index
间伐抽稀 thinning and tree density adjustment	未间伐前(CK)	75.90	45.4	35.60	27.8
	间伐	65.30	38.4	27.60	21.6
	间伐+药剂	19.70	20.5	15.40	12.6
修剪 pruning	未修剪前(CK2)	58.40	38.3	34.40	23.2
	轻修	52.70	34.4	28.90	22.8
	中修	60.30	38.9	33.80	25.1
	重修	64.30	42.1	35.70	26.9
	轻修+药剂	18.40	20.2	13.50	12.8
林地清理 cleaning	未清理前(CK3)	75.30	46.2	48.90	27.7
	彻底清理	43.50	31.6	36.60	21.4
	简单清理	69.80	42.6	45.40	26.9
	彻清+药剂	13.20	18.3	11.10	10.6
施肥 fertilizer	未施肥前(CK4)	82.50	36.1	45.60	25.5
	施氮肥	88.50	38.4	48.60	28.5
	施磷钾肥	59.80	25.9	29.40	17.6
	施氮磷钾肥	66.10	33.9	44.80	23.6
	氮肥+药剂	29.30	26.5	14.10	13.1
	磷钾肥+药剂	20.80	22.3	10.40	9.5
	氮磷钾肥+药剂	21.70	19.8	9.80	8.7
松土 loosning soil	未松土前(CK5) before the loosening soil	83.40	39.5	47.60	26.3
	1次	79.50	34.4	43.60	24.3
	2次	57.30	22.8	31.70	18.6
	松土+药剂	15.10	19.6	10.10	8.9

处理 treatment	平均发病率/% average incidence rate	平均病情指数 average disease index
纯林改造前 pure forest without transformation	72.30	33.6
改为混交林后 the transformation of pure forest into mixed forest	44.40	22.2
混交+药剂 mixed forest+chemical pesticide	9.20	7.9

试验号 No.	处理 treatment								感病指数减退率/% decline rate of disease index		减退率平方根反正弦 arcsinx of square root of decline rate
试验号 No.	A		B		C		D		感病指数减退率/% decline rate of disease index		减退率平方根反正弦 arcsinx of square root of decline rate
1		1		1		1		1		10.30		18.72
2		1		2		2		2		39.90		39.17
3		1		3		3		3		70.40		56.98
4		2		1		2		3		73.60		59.08
5		2		2		3		1		74.40		43.51
6		2		3		1		2		77.30		61.55
7		3		1		3		2		65.60		54.09
8		3		2		1		3		80.40		63.72
9		3		3		2		1		29.60		32.96
K₁		114.87		131.89		143.99		95.19
K₂		164.14		146.4		131.2		154.81
K₃		150.77		151.49		154.58		179.78
k₁		38.29		43.96		48.00		31.73
k₂		54.70		48.80		43.740		51.60
k₃		50.26		50.50		51.53		59.93
R		16.41		6.54		7.79		28.20

A study on the ecological control of red blight of Metasequoia glyptostroboides by integrated forest management

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[1]	LU Dongsheng, LU Shuai, PAN Zhongchao, LI Jiajia. Biological diversity and ecological distribution of endophytic fungi in Metasequoia glyptostroboides [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2013, 37(06): 33-36.
[2]	FAN Binqi,SU Peng,HAO Dejun,WANG Yan, ZHANG Yuefeng. Effects of Brevipalpus lewisi infested on physiological, biochemical and volatile components in Metasequoia glyptostroboides leaves [J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2012, 36(03): 28-32.