毛竹幼苗生长的NH_(4)^(+)效应研究  

Specific Response of Phyllostachys edulis Seedling to NH_(4)^(+)

作　　者：张丹 侯利涵 李湘 黄恒宇 袁斯齐 李子叶 邹娜[1] Zhang Dan;Hou Lihan;Li Xiang;Huang Hengyu;Yuan Siqi;Li Ziye;Zou Na(Jiangxi Provincial Key Laboratory of Improved Variety Breeding and Efficient Utilization of Native Tree Species,College of Forestry,Jiangxi Agri-cultural University,Nanchang Jiangxi 330045,China)

机构地区：[1]江西农业大学林学院,江西乡土树种良种选育和高效利用江西省重点实验室,江西南昌330045

出　　处：《西南林业大学学报(自然科学)》2025年第1期18-25,共8页Journal of Southwest Forestry University:Natural Sciences

基　　金：国家自然科学基金项目(32060254,32260428)资助;江西省重点研发计划项目(20203BBGL73227)资助。

摘　　要：以毛竹实生幼苗为材料,在室内控制盆栽条件下,设置等氮浓度的不同含氮化合物,并以等物质的量浓度的K_(2)SO_(4)、NaCl、NaNO_(3)及KNO_(3)和CK进行试验,分析不同处理对毛竹幼苗生长指标和栽培基质pH的影响。结果表明:毛竹幼苗地上部分各生长指标、叶绿素相对含量、根系构型各指标、地上地下部分及总生物量,都是在含NH_(4)^(+)化合物处理条件下要显著优于其他化合物处理,但在不同含NH_(4)^(+)化合物处理之间,各生长指标差异不显著;经含NH_(4)^(+)化合物处理的毛竹幼苗根冠比显著低于CK及NaCl处理;经含NH_(4)^(+)化合物处理后的毛竹幼苗栽培基质pH值,显著低于CK及其他化合物处理。含NH_(4)^(+)化合物中的NH4+对毛竹幼苗生长有显著促进作用,其促进效应可能与改变栽培介质pH值有关。因此,毛竹幼苗育苗栽培过程中应施以硫酸铵或氯化铵为主的铵态氮肥。Phyllostachys edulis seedlings were used as experimental materials,under indoor controlled pot conditions,nitrogen compounds with equal nitrogen concentration were set up,and K_(2)SO_(4),NaCl,NaNO_(3),KNO_(3) and blank treatment(CK)were used as controls,to study the effects of different treatments on P.edulis seedling growth index and cultivation matrix pH.The results showwd that:growth indexes,relative chlorophyll content,root configuration indexes,above-ground,below-ground and total biomass of P.edulis seedlings treated with NH_(4)^(+)compounds were significantly better than that treated with other compounds,but there were no significant differences between the NH_(4)^(+)compounds treated seedlings;the root shoot ratios of bamboo seedlings treated with NH4+compounds were significantly lower than that of CK and the NaCl treated seedlings;culture substrate pH values under NH_(4)^(+)compound teratments were significantly lower than that of CK and the other compound treat-ments.The NH_(4)^(+)ion within NH_(4)^(+)compounds had significant promotion effects on the growth of P.edulis seed-lings,and its promotion effect might be related to the reduced culture substrate pH value.Therefore,ammonium nitrogen fertilizer such as ammonium sulfate or ammonium chloride should be better applied in the cultivation process of P.edulis seedlings.

关 键 词：毛竹 实生苗 特异性 NH_(4)^(+) 生长响应 根系构型 

分 类 号：S795[农业科学—林木遗传育种]