施用钾肥对筇竹幼苗生长及叶片SPAD值的影响  

Effect of Potash Application on Growth and Leaf SPAD Value of Qiongzhuea tumidinoda Seedlings

作　　者：黎卫东 董文渊[2] 钟欢 付廷轩 段继霞 孙建业 浦婵 李鑫 Li Weidong;Dong Wenyuan;Zhong Huan;Fu Tingxuan;Duan Jixia;Sun Jianye;Pu Chan;Li Xin(College of Forestry,Southwest Forestry University,Kunming 650224,China;Institute of Qiong Bamboo,Southwest Forestry University,Kunming 650224,China;Daguan Forestry and Grassland Bureau,Daguan 657400,Yunnan,China)

机构地区：[1]西南林业大学林学院,昆明650224 [2]西南林业大学筇竹研究院,昆明650224 [3]大关县林业和草原局,云南大关657400

出　　处：《世界竹藤通讯》2024年第4期24-28,34,共6页World Bamboo and Rattan

基　　金：云南省省级林业科技推广项目(2023ts02);云南省董文渊专家基层科研工作站项目(云南省董文渊专家基层科研工作站项目)。

摘　　要：以1年生筇竹实生苗为对象,设置4个钾肥施用量处理:75、150、225、300 kg/hm^(2),以不施肥为对照(CK),探讨不同钾肥施用量对筇竹幼苗生长及其叶片叶绿素、氮素含量的影响。结果表明:1)施用钾肥可显著促进筇竹幼苗地径和株高的生长,所有施钾处理组的苗木地径和株高都优于对照组,其中钾肥施用量为150 kg/hm^(2)时的促进效果最佳,苗木地径较对照提高35.87%,株高较对照提高57.35%;2)随着钾肥施用量的增加,筇竹叶片SPAD值和氮含量均呈先上升后下降的变化趋势,且在施用量为150 kg/hm^(2)时达到最大值。综合考虑筇竹苗地径、株高、叶片SPAD值及氮含量等因素,试验区筇竹苗培育过程中的最优钾肥施用量可选择150 kg/hm^(2)。Four potash fertilizer application treatments are set up for 1-year-old Qiongzhuea tumidinoda seedlings:75,150,225,and 300 kg/ha,with no fertilizer as the control(CK),to explore the effects of different potash fertilizer application treatment on the seedlings growth and the contents of chlorophyll and nitrogen in their leaves.The results find that:1) the application of potash could significantly promote the growth of ground diameter and height of Q.tumidinoda seedlings,and the ground diameter and the height of seedlings in all potash treatments are better than those in the CK.Among them,the potash application treatment of 150 kg/ha has the best effect,resulting in a 35.87% increase in ground diameter and 57.35% increase in height compared to the CK;and 2) With the increase of potash application amount,the SPAD value and the nitrogen content in leaves show a trend of first increasing and then decreasing,and reach their maximum value at 150 kg/ha.Considering the factors of ground diameter,height,leaf SPAD value and nitrogen content of Q.tumidinoda seedlings,the optimal potash application amount should be 150 kg/ha for Q.tumidinoda seedlings cultivation in the experimental area.

关 键 词：筇竹 苗木培育 钾肥施用量 光合效率 

分 类 号：S795[农业科学—林木遗传育种]