磷肥施用方式对长白落叶松播种苗生长的影响  

Effects of phosphorus applying method on growth of Larix olgensis sowed seedlings

作　　者：孙宇[1] 李国雷[1] 刘勇[1] 马履一[1] 贾忠奎 祝燕[1] 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083 [2]吉林省吉林市龙潭区江密峰苗圃,吉林吉林132206

出　　处：《南京林业大学学报（自然科学版）》2011年第5期16-20,共5页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：中央高校基本科研业务费专项资金项目(BLJD200905);"十一五"国家科技支撑计划(2006BAD24B01);国家自然科学基金项目(30972353)

摘　　要：以长白落叶松播种苗(1-0)为试验材料,采用裂区设计,主区为磷肥量,副区为水施比例,研究了磷肥量和水施比例对苗木生长和磷吸收的影响。结果表明:各组织磷浓度、磷肥利用率在3个磷肥处理间差异显著,其中各组织磷浓度在326 kg/hm2磷肥处理下达到最大,而磷肥利用率则在最小磷肥量163 kg/hm2处理下达到最大,平均值为4.3%,并且随磷肥量的增大而逐渐降低;各组织磷质量分数、磷含量以及磷肥利用率在5种水施比例间差异达到显著水平,并且在33.3%水施比例处理下达到最大,其中全磷含量平均值为0.079 g/株,磷肥利用率平均值为4.3%。因此在326 kg/hm2磷肥施用量下,将2/3磷肥用做底肥,1/3磷肥用于水施追肥为最佳长白落叶松播种苗磷肥施肥方式。Phosphorus（P） is hard to dissolve and be absorbed for plants.To improve the P efficiency and find the best P applying method,Larix olgensis sowed seedlings（1-0） were used to study the growth effect and P-uptaking by seedlings affected by P amounts and fertigation ratios.The experiment conducted the split-spot design,with P amounts as main treatment and fertigation ratios as side treatment.The results showed that P concentration,P content,phosphorus using efficency was affected by phosphorus amounts significantly.The P concentration arrived the highest lever under the phosphorus amount 326 kg/hm2,but the phosphorus use efficency increased as the phosphorus deceased,and arrived the highest lever（4.3 %）under the phosphorus amount 163 kg/hm2.At the same phosphorus amounts,fertigation ratios also had remarkable effect on P concentration,P content and phosphorus using efficency.Maximum of these indicators exhibited under 33.3 % fertigation ratio,for example the total P content and phosphorus use efficiency were 0.079 g and 4.3 % respectively.The results showed that the best fertigation ratio was 33.3%.So a combination of two thirds of the phosphorus as basal fertilizer when transplanted,and one third as topdressing in August is the best phosphorus applying method for L.olgensis sowed seedlings.

关 键 词：长白落叶松 播种苗 水施 条施 磷肥 

分 类 号：S723[农业科学—林木遗传育种]