施肥对杜仲叶含胶量与生长量的影响

The Effectsof Fertilization on Gutta Contents and Growth in the Leaves of Eucommia ulmoides

测定了 9个不同 N、P配比处理对杜仲叶含胶量与生长量的影响 ,结果表明 ,( 1)杜仲叶片含胶量除 N3P2 、N3P3外 ,其它处理均比对照有所增加 ,以 N1P2 为最高 ;( 2 )杜仲施肥后 ,对照的地径生长有两个峰期 ,其它各处理先后自 5月 15日～ 6月 15日开始加速生长 ,至 9月 15日总体形成一个峰期 ,8月生长最快 ,以 N1P2 和 N1P3处理最大 ;( 3)高生长对照有两个峰期 ,除 N3P2 出现两个峰期 ,其它各处理先后由 4月 15日～ 5月 15日开始至 9月 15日基本形成一个峰期 ,6～ 7月生长最快 ,以 N1P2 和 N1P3最大 ;( 4)从杜仲生长速率看 ,施肥应在杜仲芽萌动前进行 ,施肥配比 N1P2 ( N:P2 O5=1:1.2 )为最优。

The experimental results of9kinds of fertilization on gutta contents and growth in the leaves of Eucommides ulmoidesindicated that:(1) All gutta contents in the leaves of Eucommia ulmoidestreated with rertilization,except N3P2 and N3P3, are higher than control ones.The group treated with N1 P2 is the highest in them. ( 2 ) Diameter of Eucommia ulmoidesin control group has two growth peak periods. One of other treated groups have one peak period which the peak pointis in August .The effect of N1 P2 and N1 P3groups is the best in them.( 3 ) Height of Eucommia ulmoidesin control group has two peak period.One of other treated groups,except N3P2 ,have one peak period which peak point is in June to July.The effect of N1 P2 and N1 P3groups is the best in them.( 4 ) According to growth rate of Eucommia ulmoides,fetilization should be done before sprouting.In them,effect of N1 P2 fer- tilizer( N∶ P2 O5=1∶ 1 .2 ) is the best.