N、P、K营养元素不同配比对马占相思苗期生长的影响  

Effects of Varied Fertilization Strategy with N,P,K Nutrients on the Growth of Acacia mangium Saplings

作　　者：刘水娥[1] 张方秋[1] 陈祖旭[1] 孟宪法[1] 

机构地区：[1]中国林业科学研究院热带林业研究所,广东广州510520

出　　处：《林业科学研究》2002年第2期163-168,共6页Forest Research

基　　金："九五"国家攻关"相思纸浆用材树种良种选育与培育技术研究"(96 0 1 0 11 0 5 )

摘　　要：采用N、P、K 3营养元素 5个水平配比试验 ,分析不同配比对马占相思苗期生长的影响 ;通过正交试验 ,确定马占相思苗木对各营养元素的实际需求水平。结果表明 ,P素对马占相思苗期生长影响最大 ,其次为K素 ,而N素的影响相对较小。不同水平的N、P、K配比对试验苗有不同的影响 ,其中 ,N∶P∶K最佳配比为 :190∶2 5∶16 0 (mg·L- 1)。With the increasing consumption of pulps and timbers in the world, many exotic tree species have been introduced to China. Among these exotic species, Acacia mangium has become a major species in plantation forestry in tropical and subtropical China, which has properties of fast growing and nitrogen fixing. This paper reports the experimental results on the fertilization strategy. Effects of varied levels of N,P,K nutrients on the growth of A. mangium saplings in a water culturing system are demonstrated. In general, phosphorus (P) is the most important factor influencing the growth of A. mangium saplings, followed by potassium (K) and nitrogen (N) respectively. The less importance of nitrogen nutrient supports the fact that roots of A. mangium are able to transfer aerial N 2 to organic nitrogen with N fixing bacteria. The optimum fertilization lever of N,P,K is at the ratio of 190(N):25(P):160(K) mg·L -1 ?

关 键 词：N P K 营养元素 配比 马占相思 苗斯生长 苗期施肥 磷 钾 氮 

分 类 号：S792.99[农业科学—林木遗传育种] S723.7[农业科学—林学]