枯落物的种类及覆盖厚度对云南松种子萌发与幼苗生长的影响  

Effects of Litter Type and Thickness on Seed Germination and Seeding Growth of Pinus yunnanensis

作　　者：唐翠平[1] 袁思安[1] 李骄[1] 李慧强[2] 方向阳[1] 李建华[1] 李根前[1] 

机构地区：[1]西南林业大学林学院,云南昆明650224 [2]四川农业大学建筑与城乡规划学院,四川都江堰611830

出　　处：《贵州农业科学》2014年第8期191-194,共4页Guizhou Agricultural Sciences

基　　金：西南林业大学科技创新基金项目"不同枯落物厚度对云南松种子萌发的影响"(1347)

摘　　要：为了解枯落物的种类及覆盖厚度对云南松自然更新状况的影响,采用模拟自然条件,选择云南松针叶和麻栎叶,通过设置0cm、2cm、4cm和6cm的覆盖厚度,研究其对云南松种子萌发和幼苗生长的影响。结果表明:1)2种枯落物覆盖的土壤含水率随浇水间隔时间的增加而呈下降趋势。其中,间隔浇水24h时,各处理的土壤含水率依次为M2>Y2>Y4>CK>M4>Y6>M6;间隔浇水48h时,各处理的土壤含水率依次为Y4>M2>Y2>M4>Y6>M6>CK;间隔浇水72h时,各处理的土壤含水率依次为Y4>Y6>M2>M4>M6>Y2>CK;不同处理的土壤含水率下降速率依次为CK>Y2>M2>Y4>M4>Y6>M6。2)麻栎叶覆盖对种子截留、霉变、虫蛀的影响大于云南松针叶,且随厚度的增加,影响越大。3)云南松针叶和麻栎叶覆盖均使云南松种子发芽率降低,且随厚度增加,发芽率越低;相同覆盖厚度时,麻栎叶覆盖的种子发芽率较云南松针叶低。4)2cm、4cm云南松针叶覆盖和2cm麻栎叶覆盖的幼苗存活率、生长状况均优于对照,综合考虑其种子萌发效果和幼苗生长状况,以2cm云南松针叶覆盖较好。To probe the effects of litter type and thickness on natural regeneration of P.yunnanensis, the authors simulated 0 cm,2 cm,4 cm and 6 cm different litter thicknesses of P.yunnanensis and Quercus acutissima to study its effects on seed germination and seeding growth of P.yunnanensis.The results showed：1 ） The soil content decreased with interval watering time increasing under two litters treatments.After watering 24 h,the soil content of all treatments were M2＆gt;Y2＆gt;Y4＆gt;CK＆gt;M4＆gt;Y6＆gt;M6;After watering 48h,the soil content of all treatments were Y4＆gt;M2＆gt;Y2＆gt;M4＆gt;Y6＆gt;M6＆gt;CK;after watering 72 h,the soil content of all treatments were Y4＆gt;Y6＆gt;M2＆gt;M4＆gt;M6＆gt;Y2＆gt;CK;the decreasing rate of soil content of different treatments were CK＆gt;Y2＆gt;M2＆gt;Y4＆gt;M4＆gt;Y6＆gt;M6.2）Effects of blocking, mildew,damaged by worms of seeds were larger by Q.acutissima treatments than P.yunnanensis,and the effects was more serious with the thickness increasing.3）The germination rate decreased by the two litter treatments,and it was lower with the thickness increasing with the Q.acutissima treatments.4） The seeding survival rate and growth conditions were better under 2 cm,4cm litter of P.Yunnanensis and 2 cm litter of Q.acutissima than the CK ,but 2cm litter of P.Yunnanensis was optimum based on seed germination and seeding growth condition.

关 键 词：枯落物种类 枯落物厚度 种子萌发 幼苗生长 云南松 

分 类 号：S791.257[农业科学—林木遗传育种]