摘要
为了解GA_(3)和COS溶液浸种和缓释肥对云南松种子发芽和成苗的影响,提供云南松苗木培育的种子发芽及其播种量计算,以及基质施肥的科学依据和参考。采用L_(9)(3^(4))正交设计,开展GA_(3)和COS溶液浸种及基质施缓释肥对云南松种子发芽性状、苗木保存率和种子成苗率的影响试验研究。处理组合平均发芽率、发芽势、发芽时间和发芽指数分别为79.0%~88.3%、21.3%~61.0%、17.1~19.4d和2.5~2.8粒/d,处理组合间的发芽势和平均发芽时间呈现显著或极显著的差异(P<0.05或P<0.01);影响发芽率和发芽指数的主导因子是COS和基质施缓释肥的交互作用,影响发芽势和平均发芽时间的则是基质施缓释肥。缓释肥的3种施肥量对种子发芽势和平均发芽时间具有显著或极显著的差异(P<0.05或P<0.01)。处理组合的苗木保存率和种子成苗率分别为91.3%~95.8%和73.3%~82.3%,处理组合间苗木保存率具有显著的差异(P<0.01)。影响苗木保存率的主导因子是基质施缓释肥,COS及COS和基质施缓释肥的交互作用共同构成对种子成苗率等同效果的主导因子。外源激素GA_(3)、养分COS和基质施缓释肥的不同水平组合显著或极显著改变种子发芽势、平均发芽时间和苗木保存率(P<0.05或P<0.01)。GA_(3)和COS浓度分别为0.20g/L和0.5%的溶液浸种,结合基质施0.50kg/m^(3)缓释肥组合的种子发芽率和成苗率最高,可应用于生产实践,以保障种子,尤其是良种有效的培育苗木。
In order to understand the effects of seed soaking in gibberellin(GA_(3))and Chitosan oligosaccharide(COS)solution involved slow-release fertilizer(SRF)on seed germination and seed growing seedlings of Pinus yunnanensis,the purpose was to provide the calculation of seed germination and sowing seed amount of Pinus yunnanensis,and to offer scientific basis and reference for substrate fertilization.The L_(9)(3^(4))orthogonal design was applied to implement the trial of the effects of seed soaking in GA_(3) and COS solutions and fertilizing the SRF in the substrate on seed germination traits,Seedling survival rates(SSRs)and seed seedling percents(SSP)of P.yunnanensis.The results showed that mean germination rates(GRs),germination potential(GPs),germination time(MGTs)and germination index(GIs)of treatment combinations(TCs)were 79.0%‒88.3%,21.3%‒61.0%,17.1‒19.4d and 2.5‒2.8 seed/day,respectively,with significant differences of the GPs and MGTs between the TCs(P<0.05 or P<0.01);the dominant factor affecting the GR and GI was the interaction between the COS and fertilized SRF in the substrate,while the SRF was the dominant factor affecting the GP and the MGT.The three fertilization amounts of the SRF in the substrate had significant differences on seed GP and the MGT(P<0.05 or P<0.01).The SSRs SSPs of the TCs were 91.3%‒95.8%and 73.3%‒82.3%,respectively,with significant differences of the SSRs between the TCs(P<0.01).The dominant factor affecting the SSR was the SRF,while COS and the interaction of COS and the SRF together constitute the dominant factor with the same effect on the SSP.The combinations of exogenous hormone GA_(3),nutrient COS and the SRFs in the substrate significantly changed the seed GPs,MGTs and SSRs(P<0.05 or P<0.01).The TC of the 0.20 g/L GA_(3) and 0.5%COS solution soaking seeds combined the 0.50kg/m^(3) SRF in the substrate had the highest GR and SSP,which could be applied to production practice to ensure the effectively raising seedlings of the seeds,especially improved varieties’seeds.
作者
张合瑶
李莲芳
刘娴
顾梦
周冬梅
李小军
ZHANG Heyao;LI Lianfang;LIU Xian;GU Meng;ZHOU Dongmei;LI Xiaojun(Southwest Forestry University,Kunming 650224,China)
出处
《林业建设》
2023年第1期44-50,共7页
Forestry Construction
基金
国家“十三五”重点研发计划(2017YED0600500)
关键词
云南松
种子发芽
成苗率
赤霉素
壳寡糖
缓释肥
pinus yunnanensis
seed germination
seed seedling percent
gibberellin
chitosan oligosaccharide
Slow-release fertilizer
