摘要
以日本落叶松1.5代和2代种子园为研究对象,施用N肥、P肥、K肥,采用正交试验设计,调查并分析了施肥处理对日本落叶松种子园母树球果和种子特性的影响,有效提高落叶松种子园种子产量,满足生产上对落叶松良种的需求。结果表明:从球果形质特征上看,施肥可显著促进日本落叶松1.5代和2代种子园单果质量、球果纵径和横径的增加,其中,1.5代种子园中,“N(0.4 kg/株)+P(0.6 kg/株)+K(0.6 kg/株)”处理的单果质量和球果纵径最大,分别达到4.01g和3.14cm,分别为CK的1.79倍和1.37倍,“N(0.2kg/株)+P(0.6kg/株)+K(0.4kg/株)”处理的球果横径最大,达到2.26cm,为CK的1.1倍;2代种子园中,“N(0.2 kg/株)+P(0.8 kg/株)+K(0.6 kg/株)”处理的单果质量、球果纵径和横径等指标均较高,分别达到8.23g、3.74 cm和2.58 cm。从种子形质特征上看,施肥对日本落叶松1.5代、2代种子园种子形质指标的影响有限,施肥仅对1.5代种子园种子纵径、横径和侧径及2代种子园千粒质量有显著影响。较高的K肥和适量的N肥施用量有利于球果和种子的增大,日本落叶松种子园施肥较优方案为N肥0.4 kg/株、P肥0.6 kg/株、K肥0.6 kg/株。
Larch is one of the most important tree species for industrial afforestation in China,and its produc-tion is related to the development of larch plantation industry.In order to effectively improve the seed yield of Larix kaempferi seed orchard and meet the demand for improved larix seed varieties in production,the 1.5 and 2 generation seed orchard of Larix Kaempferi was taken as the research object in this study,and N fertilizer,P fertil-izer and K fertilizer were applied as fertilizers,and orthogonal experimental design was adopted.The effects of fertilization treatment on cone and seed characteristics of parent tree of Larch seed orchard were investigated and analyzed.The results show that:In terms of cone characteristics,fertilization significantly increased the weight of single fruit,the longitudinal diameter of cone and the transverse diameter of cone in 1.5 and 2 generations of Ja-panese larch seed garden.In 1.5 generation seed garden,the weight of single fruit and the longitudinal diameter of cone were the largest under"N(0.4 kg/plant)+P(0.6 kg/plant)+K(0.6 kg/plant)"treatment.The transverse dia-meter of cone treated with"N(0.2 kg/plant)+P(0.6 kg/plant)+K(0.4 kg/plant)"was the largest,reaching 2.26 cm,which was 1.1 times that of CK.In the second generation seed garden,the weight of single fruit,longitudinal diameter and transverse diameter of cone under"N(0.2 kg/plant)+P(0.8 kg/plant)+K(0.6 kg/plant)"treatment were higher,reaching 8.23 g,3.74 cm and 2.58 cm,respectively.In terms of seed characteristics,the effects of fer-tilization on seed shape and quality indexes of 1.5 and 2 generations of Larch were limited,and fertilization only had significant effects on longitudinal diameter,transverse diameter and lateral diameter of seeds in 1.5 genera-tions of seed orchard and 1000-grain weight in 2 generations of seed orchard.In conclusion,higher K fertilizer and appropriate N fertilizer application rate are conducive to the growth of cones and seeds.The optimal fertiliza-tion scheme for Japanese Larch seed orch
作者
王骞春
战金伟
杨圆圆
李光
卜鹏图
陈若楠
冯健
Wang Qianchun;Zhan Jinwei;Yang Yuanyuan;Li Guang;Bu Pengtu;Chen Ruonan;Feng Jian(Liaoning Academy of Forestry Science,Shenyang Liaoning 110032,China;Da Gu Jia Forest Farm,State-owned Qingyuan Manchu Autonom-ous County,Fushun Liaoning 113300,China;Qing Liang Shan Forest Farm,State-owned Xiuyan Manchu Autonomous County,Anshan Liaoning 114312,China;Cheng Jiao Forest Farm,State-owned Qingyuan Manchu Autonomous County,Fushun Liaoning 113300,China;Liaoning Baishilazi Forest Ecosystem National Research Station,Dandong Liaoning 118201,China)
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2024年第3期10-17,共8页
Journal of Southwest Forestry University：Natural Sciences
基金
“十四五”国家重点研发计划(2022YFD220030204)资助
辽宁省农业科学院学科建设(2022DD217036)资助。
关键词
日本落叶松
球果
种子形质
种子园
Larix kaempfri
strobilus
seed shape
seed orchard
