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蓝桉幼林施肥效应研究 总被引:1,自引:0,他引:1
在云南省保山市石灰岩红壤地区进行了历时4年的蓝桉幼林N、P、K不同配比的10种处理施肥试验。结果表明,施肥能明显促进蓝桉(Eucalyptusglobulus)幼林的生长;其中处理6、9、10增产效果极显著,树高增加16.31%~20.40%,胸径分别增加18.78%~19.21%,材积增加65.04%~70.19%。有机肥对蓝桉生长有促进作用,施过有机肥的处理10生长始终保持优势;磷肥是蓝桉增产的主要因素,每株施430g钙镁磷肥做底肥能使树高、胸径分别增加14.67%、15.87%,每株施215g钙镁磷肥则树高、胸径分别增加11.44%、7.83%;氮肥各水平间无差异,增产效果不明显;钾肥1、2水平间无差异,3水平可能过量,阻碍了肥效发挥。施肥能提高蓝桉生产的经济效益,较好的几个处理依次为6、9、2、10、3产出投入比值均大于对照。综合以上几个因素,N2P3K2为蓝桉幼林的最佳施肥方案。 相似文献
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10 fertilization tests of different match and
ratio of N,P,K were conducted on young Eucalyptus globulus plantation in limestone red
soil in Baoshan City for 5 years. The results of tests indicated that fertilization
obviously promoted the growth of young E. globulus plantation. At 1.5 years after
afforestation,the growth response was at the highest point,the height and DBH of the
tree were promoted by 33.69%,48.39% for the 9 manuring treatments. At 5 years after
afforestation,the growth response were promoted by 16.45%,10.71% for the 9
manuring treatments. Phosphoric fertilizer is the main factor in promoting the growth of
E. globulus plantation.Applying 430 g calcium magnesium phosphate as base fertilizer for
each tree,can make the best growth response. The growth responses of N,K fertilizer is
not obvious. Organic fertilizer can promot the growth of the trees. Among the 10
treatments,the 3 treatments of No.6 (65 g carbamide,430 g calcium magnesium
phosphate),No.9 (130 g carbamide,430 g calcium magnesium phosphate ,54 g KCl),No.10
(treatmet No.9 added with 5 kg organic fertilizer) gained remarkable growth effect.
The treatments with best economic benefit are No.6 and No.9. 相似文献
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