Study on the Characteristics of New Branches of Empetrum nigrum var.japonicum in Three Types of Habitats

doi:10.13466/j.cnki.lyzygl.2019.02.014

Abstract

Abstract:

Empetrum nigrum var.japonicum has medicinal value,which grows slowly and has narrow distribution .It is a rare and endangered plant in China.With the Empetrum nigrum var.japonicum as the object of study,the new branches were divided into three types:extended branch,caespitose branch and axillary branch.Comparison of the proportion of new branch types,leaf traits and biomass in three habitats,provides useful information for cultivation and protection.The results showed that the extended branch and caespitose branch were the most common type of new branches,and SP=2,SP=3 was the most common type in the three habitats.There were fewer new branches in the forest edge and stone gap than in the sparse forest,the leaf area and the ratio of leaf length to width of the stone gap were the largest,the biomass of flower bud was the largest,the biomass of branch was smaller than that of the sparse forest,and the sexual reproduction ability was stronger.The ability of producing new branches is high and the ability of asexual reproduction is strong.There was no significant difference in the average length of new branches between different habitats and different types,but the diameter of elongated branches in sparse forests was significantly higher than that of forest edge and stone gaps,and there was also significant difference between extended branches and caespitose branches (P<0.05).

Key words: Empetrum nigrum var.japonicum, habitats, new branch type, leaf character, biomass

CLC Number:

Q948

AN Huijun, YANG Linlin, ZHOU Lei, ZHANG Xueying, CHE Yachao. Study on the Characteristics of New Branches of Empetrum nigrum var.japonicum in Three Types of Habitats[J]. FOREST RESOURCES WANAGEMENT, 2019, (2): 93-98.

Figures/Tables 9

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生境类别	石隙	林缘	疏林
东经E	122°26'01.05″	122°26'01.27″	122°26'01.68″
北纬N	52°14'18.80″	52°14'18.31″	52°14'19.74″
海拔/m	748.4	755.3	729.6
坡向	北偏东60°	北偏东60°	北偏东60°
坡度/(°)	23	23	23
乔木	—	—	樟子松、落叶松
郁闭度	—	—	0.2
样方植物组成 (盖度)	东北岩高兰(90%)石蕊(100%)、越桔(10%)、绣线菊(<1%)	东北岩高兰(40%)石蕊(80%)、越桔(30%)	东北岩高兰(60%)石蕊(100%)、越桔(40%)
周围环境	周围10m内无乔木,阳光充足	石隙与疏林的交界处,距离疏林约5m,少量枯枝落叶覆盖,阳光较充足	大量枯枝落叶覆盖,乔木遮阴,阳光相对较弱

新生枝类型	生境类型
新生枝类型	石隙	林缘	疏林
延长枝比例	77.8	78.9	54.4
簇生枝比例	22.2	21.1	45.6
逐步分枝率	1.51	1.41	2.10

生境类型	簇生枝/枝(比例/%)				合计	簇生分枝率/%
生境类型	SP=2	SP=3	SP=4	SP≥5	合计	簇生分枝率/%
石隙	5(25.0)	9(45.0)	2(10.0)	4(20.0)	20	3.30
林缘	8(42.1)	7(36.8)	2(10.5)	2(10.5)	19	2.95
疏林	14(34.1)	13(31.7)	6(14.6)	8(19.5)	41	3.37

测量指标	枝类型	生境类型
测量指标	枝类型	石隙	林缘	疏林
长度/cm	延长枝	1.49±0.74Aa	1.42±0.65Aa	1.52±0.65Aa
长度/cm	簇生枝	1.39±0.89Aa	1.48±0.91Aa	1.57±0.89Aa
粗度/mm	延长枝	0.38±0.11Aab	0.35±0.10Ab	0.40±0.09Aa
粗度/mm	簇生枝	0.37±0.13Aa	0.34±0.13Aa	0.36±0.11Ba

叶性状	生境类型			F	P
叶性状	石隙	林缘	疏林	F	P
叶长/mm	4.2098±0.0685a	3.8197±0.0898b	3.5201±0.0822c	18.39	<.0001
叶宽/mm	1.0231±0.0132a	1.1051±0.0265b	0.9263±0.0163c	21.02	<.0001
叶面积/mm²	3.9741±0.1185a	3.2049±0.1093b	3.0291±0.1084b	20.07	<.0001
叶长宽比	4.1170±0.0460a	3.4970±0.0823b	3.8025±0.0604c	23.00	<.0001