摘要
为探明氮素对油茶嫁接苗在不同水分条件下叶片、根部养分含量变化,从而为油茶苗期合理施肥,提高抗性提供依据。以2年生油茶嫁接苗为试验对象,对其在不同水分（土壤含水量分别为：28%~31%、15%~18%、9%~12%）和不同浓度氮素（0、0.375、0.75 g/株）条件下,通过生理生化试验方法,测定油茶嫁接苗叶片、根部C、N、P、K的含量。结果表明：在土壤水分胁迫条件下,施加低氮（0.375 g/株）更有利于苗木在土壤水分胁迫条件下C、N、P、K积累。在土壤水分轻度胁迫条件下,施加低氮、高氮均促进叶片、根部C、N、P积累,不能促进K的积累。在土壤水分重度胁迫条件下,施加低氮促进叶片C、N、P、K和根部C、N、K的积累,施加高氮不能促进叶片C积累,但能促进根部C、N的积累。
The nutrient content of leaves and roots of Camellia oleifera grafted seeding was studied under different water conditions in order to provide a basis for reasonable fertilization and improve resistance of Camellia oleifera seedling. The content of C, N and P content of biennial Camellia oleifera grafted seeding under different water（soil moisture content： 28%-31%, 15%-18%, 9%-12%） and nutrient（0, 0.375, 0.75 g per seedling） conditions was investigated by physiological and biochemical tests. Results showed that low nitrogen（0.375 g per seedling） application made for C, N, P and K accumulation under soil water stress condition. Low and high nitrogen application made for C, N and P accumulation, but had no effect on K accumulation under light water stress. Low nitrogen application prompted C, N, P and K accumulation of leaves as well as C, N and K accumulation of roots under severe degree soil water stress. However, high nitrogen application could not prompt C accumulation of leaves but prompted C and N accumulation of roots instead.
出处
《中国农学通报》
CSCD
2014年第31期122-125,共4页
Chinese Agricultural Science Bulletin
基金
广西壮族自治区林业科学研究院基本科研业务费"油茶幼苗耐旱性试验与造林成活率相关性研究"(林科201211号)
关键词
油茶
嫁接苗
施氮浓度
Camellia oleifera
grafted seeding
nitrogen concentration application
