一年生大青杨苗吸肥规律的研究  

Study on Regular Pattern of Absorbing Nutrients in Annual Populus Lasiocarpa Seedling

作　　者：周百娟[1,2] 马振江[1,2] 冯君 宋学双[1,2] 

机构地区：[1]吉林农业大学 [2]临江林业局营林处

出　　处：《吉林农业大学学报》1996年第4期57-60,共4页Journal of Jilin Agricultural University

摘　　要：报道了一年生大青杨苗吸肥规律及苗木干物质和主要营养元素积累与分配的动态变化。结果表明，苗木形成１ｋｇ干物质对氮、磷、钾的需要量为：Ｎ２４４２ｇ，Ｐ２Ｏ５５３４ｇ，Ｋ２Ｏ１５５９ｇ。其吸肥规律为前期对氮、磷、钾的吸收分别占其总量的２２６９％，２４６８％，２９７３；中期占５５０８％，５３６８％，５１１３％；后期占２２２４％，２１６４％，１９１４％。前、中、后期吸收Ｎ∶Ｐ２Ｏ５∶Ｋ２Ｏ分别为１∶１∶１０９∶１３１。The results showed that the absorbing amount of N,P and K for 1 kg dry matter in seedling was 24.42 g, 5.34 g and 15.59 g respectively. Its regular pattern was concluded as follow: The absorption of N, P and K was 22 69%, 24 68% and 29 73% in former, middle and latter period respectively. The absorbing rate of N:P 2O 5∶K 2O were 1∶1.09∶1.31 in former period, in the middle period were 1∶0.97∶0.93 and in the latter period were 1∶0.97∶0.86 .

关 键 词：大青杨苗 干物质 施肥 

分 类 号：S792.113[农业科学—林木遗传育种]