毛竹幼苗对不同氮含量及形态的营养响应  

Growth Response of Bamboo Seedlings to Nitrogen Nutrition in Phyllostachys heterocycla cv. Pubescens

作　　者：顾红梅[1] 邓光华[1] 黄玲[1] 杨海燕[1] 杨清培[1,2] 邹娜[1,2] 

机构地区：[1]江西农业大学园林与艺术学院,江西南昌330045 [2]江西农业大学江西省竹子种质资源与利用重点实验室,江西南昌330045

出　　处：《竹子学报》2016年第3期44-49,54,共7页Journal of Bamboo Research

基　　金：国家自然科学基金青年科学基金项目(31300521);高等学校博士学科点专项科研基金(20133603120001)资助

摘　　要：采用室内可控环境盆栽方法研究毛竹幼苗对不同氮供应强度和形态的响应。结果表明,在低氮条件下不同氮素形态造成的生长差异很小;随着氮浓度的提高,毛竹幼苗苗高,叶绿素含量,叶片数,叶面积,地上地下生物量和根系构型等各生长指标在铵氮供应条件下的生长显著优于以硝氮为唯一氮源。在pH3.8条件下,毛竹幼苗能正常生长,而且生长各指标对不同氮素形态具有pH5.8条件下相似的响应特征,表明毛竹幼苗对土壤pH的适应性较广,对酸性环境具有较强的耐受能力。Seedlings of Phyllostachys heterocycla cv.Pubescens were supplied with different content of nitrogen as nitrate,ammonium,or both in vermiculite culture in a controlled condition.The results showed that there were little differences in the growth of P.heterocycla cv.Pubescens to different N forms under low content;while with the increase of N concentration,the growth indicators such as seedling height,chlorophyll content （SPAD）,leaf numbers,leaf area,biomass and root system configurations performed significantly better with the treatment of ammonium than that of nitrate as the sole nitrogen source.The seedlings showed similar growth response to N source supplied under ether pH 3.8 or pH 5.8,indicating their wide adaptability to soil pH and high tolerance to acid environment.

关 键 词：毛竹 氮含量 氮形态 生长响应 

分 类 号：S795.7[农业科学—林木遗传育种]