Study on the Methods of Removing Dormancy and Promoting Seedlings of Tilia amurensis

doi:10.13466/j.cnki.lyzygl.2020.01.023

Abstract

Abstract:

Different soaking methods,GA3 application and stratified germination experiments were used to study the dormancy removing methods of Tilia amurensis seeds.The results show that:warm water(7d)+GA₃+Freezing(13-18℃,30d;Freezing,60d;-2-2℃,60d)was the best treatment combination,the germination rate and seedling emergence rate were 84.7% and 79.5%,the seedlings emerged neatly(whole seedling for 25 days);and the quality of seedlings was good,the one-year-old average seedling height and ground diameter were 0.55M and 0.56cm,the main root length was 25.5cm and the lateral root length was 25.GA₃ soaking seed can promote the removing dormancy of Tilia amurensis seeds,the effect of stratification germination that the freezing effect of indoor high temperature+outdoor freezing+low temperature cellar is the best,followed by high and low temperature change,low temperature cellar effect again,and indoor heat is the worst.The results showed that Tilia amurensis belong to combinational dormancy,seed dormancy could be effectively removed by soaking seeds+GA₃+reasonable stratification.

Key words: Tilia amurensis, stratification, remove dormancy, seedling raising, seedling quality

CLC Number:

S723.1

Youzhi HAN. Study on the Methods of Removing Dormancy and Promoting Seedlings of Tilia amurensis[J]. FOREST RESOURCES WANAGEMENT, 2020, (1): 177-182.

Figures/Tables 4

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处理	发芽率/%	出苗率/%	出全苗时间/d
H₂SO₄(30min)+窖藏(0~4℃,30d)	19.7Aa	12.5Aa	33
H₂SO₄(30min)+室内(13~18℃,30d)	11.3Bb	7.2Bb	32
H₂SO₄(30min)+高低变温(室内13~18℃,10d;窖藏0~4℃,20d)	24.5Cc	18.9Cc	29
H₂SO₄(30min)+GA₃+窖藏(0~4℃,30d)	60.5Dd	55.8Dd	30
H₂SO₄(30min)+GA₃+室内(13~18℃,30d)	18.5Aa	11.3Aa	28
H₂SO₄(30min)+GA₃+高低变温(室内13~18℃,10d;窖藏0~4℃,20d)	78.8Ee	71.6Ee	27
温水(7d)+窖藏(-2~2℃,150d)	44.5Ff	38.4Ff	35
温水(7d)+高低变温(室内13~18℃,30d;窖藏-2~2℃,120d)	50.6Gg	44.8Gg	33
温水(7d)+室内(13~18℃,30d)+室外冷冻(60d)+窖藏(-2~2℃,60d)	79.4Ee	73.6Ee	30
温水(7d)+GA₃+窖藏(-2~2℃,150d)	52.7Gg	45.7Gg	30
温水(7d)+GA₃+高低变温(室内13~18℃,30d;窖藏-2~2℃,120d)	58.9Dd	52.3Dd	26
温水(7d)+GA₃+室内(13~18℃,30d)+室外冷冻(60d)+窖藏(-2~2℃,60d)	84.7Hh	79.5Hh	25

处理	平均苗高/m	平均地径/cm	主根长/cm	侧根条数/条
H₂SO₄(30min)+GA₃+窖藏(0~4℃,30d)	0.47±0.28Aa	0.51±0.22Aa	23.6	21
H₂SO₄(30min)+GA₃+高低变温(室内13~18℃,10d;窖藏0~4℃,20d)	0.48±0.31Aa	0.52±0.20Aa	23.3	22
温水(7d)+室内(13~18℃,30d)+室外冷冻(60d)+窖藏(-2~2℃,60d)	0.54±0.25Bb	0.55±0.15Bb	24.8	25
温水(7d)+GA₃+室内(13~18℃,30d)+室外冷冻(60d)+窖藏(-2~2℃,60d)	0.55±0.29Bb	0.56±0.19Bb	25.5	26