摘要
在江西省永丰县恩江林场贫瘠的第四纪低丘红土立地进行湿地松幼林施肥试验，用以检验幼林对Ｎ、Ｐ、Ｋ肥效的反应，和不同施肥期对幼林生长的影响。施肥后五年的生长统计分析表明：Ｎ、Ｐ配合施用效果最佳；施用量为Ｎ１００ｋｇ／ｈｍ２、Ｐ２Ｏ５１００ｋｇ／ｈｍ２时，立木蓄积达到４２．０１ｍ３／ｈｍ２，比不施肥增加９０％；单施磷肥湿地松幼林的生长反应也达到极显著水平。造林施Ｐ２Ｏ５５０～２００ｋｇ／ｈｍ２时，立木蓄积比不施肥增加３４％～７４％；Ｐ肥不同用量水平的肥效差异不显著；作基肥优于追肥，同等Ｐ量分次追施优于一次性施肥。Ｋ肥效果不明显。单施Ｎ肥在施后前三年有显著负效应，至第五年负效应消失。
The fertilization trial of young slash pine (Pinus elliottii)was established on the quarternary period red earth with low organic matter content in Yongfeng County of Jiangxi Province to examine the growth responses of N、P、K application and the effects at different dressing period.The growth responses during the first five years after fertilizing showed that the maximum stocking was 42.01 m3/hm2 from the NP treatment,as dressing N 100,P2O5 100 kg/hm2,resulting in 90% volume increase.Alone phosphours fertilizing,as dressing P2O5 50,100,200 kg/hm2 at planting,resulted in 34%～74% volume increase. No significant differences of growth response occurred in various fertilizing levels of alone P treatments.However,fertilizing P at planting gave more growth response than dressing after planting.Though obvious negative response in N alone application during the first three years after dressing,the negative response disappeared by the end of the fifth year.No significant response occurred in K application.
出处
《林业科学研究》
CSCD
北大核心
1997年第6期624-628,共5页
Forest Research
基金
"八五"国家造林项目
关键词
湿地松
幼林
施肥
生长效应
低丘红壤
fertilization young slash pine red earth on hill area growth response
