摘要
通过3因素3水平田间正交试验,研究了氮(N)、磷(P)、钾(K)肥对高羊茅(Festuca arundinaceaSchreb.)单株扩展性和根系特性的影响,以期为西北地区高羊茅草坪合理施肥提供依据。结果表明:N肥是影响高羊茅地上扩展的主要因素,N肥施量越大,植株越高,覆盖面积和地上植物量越大,分蘖随N肥施量的增加呈先增大后减小的趋势,10 g/m2N肥高羊茅的分蘖数最多;P肥是影响高羊茅地下扩展的主要因素,P肥施量越大,根系越深,地下植物量、根系表面积和根系体积越大,根系扩展幅度随P肥施量的增加呈先增大后减小的趋势,10 g/m2P肥高羊茅的根系扩展幅度最大,3种肥料对地上、地下和综合扩展性的影响大小顺序分别为N>K>P、P>N>K和N>P>K;处理组合N15P15K8,即15 g/m2N肥1、5 g/m2P肥、8 g/m2K肥是促进高羊茅地上扩展的最佳施肥组合,处理组合N5P15K12,即5 g/m2N肥1、5 g/m2P肥1、2 g/m2K肥是促进高羊茅地下扩展的最佳施肥组合,处理组合N15P10K4,即15 g/m2N肥1、0 g/m2P肥4、g/m2K肥是促进高羊茅综合扩展的最佳施肥组合。
In order to provide the scientific guidance for the turf fertilization in the northwestern China,the effects of N,P,and K fertilizers on the individual plant expansibility and root characteristics of tall fescue（Festuca arundinacea Schreb.） were studied through orthogonal field experiment with 3 factors and 3 levels.The results show that N was the main factor affecting the aboveground expansion of tall fescue.The plant height,coverage area,and aboveground biomass increased along with the increasing of N application amount and the number of tiller increased at the early stage and then decreased with the highest tiller number obtained at 10 gN·m-2.P was the main factor affecting underground expansion.The root length,underground biomass,root superficial area,and root volume increased along with the increased P application amount and the root expansion range increased at early stage and then decreased with the highest root expansion range obtained at 10 gP2O5·m-2.The effect ordering of 3 fertilizers on aboveground,underground and integrated expansibility of tall fescue was N〉K〉P,P〉N〉K,and N〉P〉K,respectively.The combination treatment of N15P15K8（15 gN·m-2,15 gP2O5·m-2,and 8 gK2O·m-2） was the best for aboveground expansibility.The best treatment for underground expansibility was N5P15K12（5 gN·m-2,15 gP2O5·m-2,and 12 gK2O·m-2）.And for the comprehensive expansibility,the best treatment was N15P10K4（15 gN·m-2,10 gP2O5·m-2,and 4 gK2O·m-2）.
出处
《草地学报》
CAS
CSCD
北大核心
2009年第5期600-606,共7页
Acta Agrestia Sinica
基金
国家科技支撑计划(2007BAD52B06)
甘肃省高等学校研究生导师科研计划(0502-14)
关键词
氮
磷
钾
高羊茅
扩展性
根系特性
Nitrogen
Phosphorus
Potassium
Tall fescue
Expansibility
Root characteristics
