摘要
2001—2004年以笋用红竹林小区精确施肥试验为基础,结合试验区内部分长期定位观测,比较研究了不同施肥处理对笋用红竹林生态系统土壤特性的影响。试验采用有机肥、纯化肥(N、NP、NPK)、有机+化肥、不施肥(CK)6个处理。结果表明:在连续3 a持续经营条件下,笋用竹林未施肥区(CK)土壤相应的有效养分消耗最快,有机质下降8.0%,全N下降5.2%,速效P下降15.0%,单施有机肥或NP、NPK化肥配施或有机无机肥料混合施用均可增加土壤有机质含量,提高次序为有机肥+化肥处理(24.08%)>有机肥处理(8.49%)>化肥NPK处理(2.28%)>化肥NP处理(1.90%),单施N肥后土壤有机质则有所下降(-4.06%),但下降幅度不如未施肥区(-7.98%)。与CK区和单施化肥区比较,有机+化肥配合施用,不但提高了土壤有效养分含量,同时增加了土壤微生物生物量,促进了土壤物质的循环,提高了竹林土壤的潜在供肥能力,有利于竹林的持续生产力的发挥。
Investigations were conducted on dynamics of soil ecological characteristics in a bamboo plantation under the 2001-2004 fertilization experiment , which was designed to have six fertilization treatments, i.e. , CK（control） , C （organic fertilization carbon）, N, NP, NPK, CNPK. The results showed that soil available nutrient pool depleted rapidly, which with the decrease of organ matter by 8.0%, of total N by 5.2% and of available P by 15.0% respectively, under 3-year consecutive cropping without fertilization in bamboo plantation. Fertilizing with C, or NP, NPK, or CNPK could increase the content of organic matter with the following order： C and （N,NP, NPK） （increase by 24.08% ） 〉 C（increase by 8. 49% ） 〉 NPK（ increase by 2.28% ） 〉 NP（ increase by 1.90% ）. However,if N was fertilized singly,the organic matter would decrease by about 4.06%. The results also showed that balanced C, N, P and K application improved available nutrient content and increased total biomass of the soil, promoted the matter circle in soil, enhanced the potential soil supply and do better to the persistent productivity of shoot bamboo plantation.
出处
《林业科学研究》
CSCD
北大核心
2006年第3期353-357,共5页
Forest Research
基金
国家"十五"科技攻关项目(2001BA506B01)
关键词
施肥
红竹林
养分供应
土壤特性
fertilization
bamboo plantation
nutrient supply
soil characteristics
