摘要
控释肥是通过调节养分的释放速率来提高肥料利用率。为探明竹林专用控释肥对毛竹地上生物量和氮利用率的影响,本研究以黄山公益林场粗放经营毛竹试验林为研究对象,以普通复混肥(CCF)和不施肥(CK)为对照处理,在毛竹生长的2个连续小年(2009年和2011年)施用竹林专用控释肥CUF-1和CUF-2,调查了Ⅰ度竹(2012年成竹)、Ⅱ度竹(2010年成竹)和Ⅲ度竹(2008年成竹)地上生物量和氮利用率。结果表明:2种竹林专用控释肥(CUF-1、CUF-2)处理的毛竹胸径、竹高、标准枝叶重以及SPAD与CCF差异不显著,但均显著高于CK;竹林专用控释肥能显著提高Ⅰ度竹和Ⅱ度竹地上生物量和氮积累量,但对Ⅲ度竹影响不大,其中Ⅰ度竹的地上生物量和氮积累量分别提高19%~61%和29%~99%,Ⅱ度竹分别提高36%~59%和55%~89%,Ⅲ度竹地上生物量和氮积累量分别小于8%和15%;CUF-1和CUF-2的氮利用率分别为69.02%和56.82%,均显著高于CCF(19.60%),说明竹林专用控释肥能显著提高林地氮利用率。
Controlled release fertilizers(CRF)have potential to increase fertilizer use efficiency of crop through regulating the nutrient release rate.According to the growth characteristics of bamboo,two controlled urea fertilizers for bamboo(CUF-1 and CUF-2)was developed with slag coated urea mixed with other nutrient elements.In this study,we assessed the aboveground biomass and nitrogen use efficiency of I du bamboo(growing into normal bamboo in 2012),II du bamboo(growing into normal bamboo in 2010),and III du bamboo(growing into normal bamboo in 2008)treated with CUF-1,CUF-2,or common compound fertilizer(CCF),and a nonfertilization(CK)treatment was also included as the control.The results showed that the bamboo DBH,height,weigh of standard branch and leaf,and SPAD all significantly increased under CUF-1 and CUF-2 treatments compared with that of CK,but were not significantly different compared with CCF.The application-of CUF-1 and CUF-2 improved the aboveground biomass and enhanced the accumulation of nitrogen of I du and]I du,but such changes in III du were neg-ligible.The increases in biomass and nitrogen accumulation by applications of CUF-1 and CUF-2 were 19%-61%and29%-99%for I du bamboo,36%-59%and55%-89%for II du bam-boo,and less than 8%and 15%for III du bamboo,respectively.The nitrogen use efficiencies of the treatments CUF-1 and CUF-2 were 69.02%and 56.82%,respectively,being higher than the treatment CCF(19.60%).Therefore,it is suggested that CUF could greatly improve the nitrogen use efficiency of bamboo forest land.
作者
封焕英
范少辉
苏文会
刘广路
FENG Huan-ying;FAN Shao-hui;SU Wen-hui;LIU Guang-lu(International Centre for Bamboo and Rattan,Key Laboratory of Bamboo and Rat-tan,Beijing 100102,China)
出处
《生态学杂志》
CAS
CSCD
北大核心
2014年第9期2357-2362,共6页
Chinese Journal of Ecology
基金
国家"十二五"科技支撑计划项目(2012BAD23B04)
国际竹藤中心基本科矿业务专项(1632011006)资助
关键词
控释肥
毛竹
年龄
生物量
氮利用率
control release fertilizer
moso bamboo
age
biomass
nitrogen use eff/ciency.
