腐殖酸桉树有机专用肥对邓恩桉抗寒促生的效应

为了科学经营耐寒桉树Eucalyptus短周期工业原料林,解决桉树速生和林地退化及冻害的矛盾,于2004年在福建省建瓯市徐墩镇建立了邓恩桉Eucalyptus dunnii速生丰产林基地,开展了腐殖酸桉树系列有机专用肥对邓恩桉抗寒促生的试验研究。结果表明,施用各有机专用肥的林分受冻率、冻害等级和冻害指数比常规化肥处理分别下降了23.9%~43.5%,25.0%~50.5%和32.4%~49.7%;林分树高、胸径、冠幅和材积等生长量指标比常规化肥处理分别提高了6.3%~26.6%,14.7%~37.2%,6.5%~18.8%和42.9%~136.7%。其中以基肥为腐殖酸桉树专用肥500 g.株-1 复合微生物菌剂10 g.株-1和追肥为腐殖酸桉树专用肥2号500 g.株-1处理的抗寒促生效果为最好,是适合福建省北部地区的较佳施肥模式。表5参11

Effects of humic acid as special organic fertilizer for Eucalyptus on cold resistance and growth stimulation of Eucalyptus dunnii

To scientifically manage the short-period industry-use forest of cold-resistant Eucalyptus and eradicate the conflicts among instant growth of Eucalyptus,degraded forestland and freezing injury,fast-growing and high-yield forest base of Eucalyptus dunnii was built in Xudun Town of Jian'ou City in Fujian Province in 2004 to test the humic acid as special organic fertilizer for Eucalyptus.Results showed that frostbite rate and grade,and freezing injury index of Eucalyptus applied with the special fertilizer decreased by 23.9%-43.5%,25.0%-50.5% and 32.4%-49.7% respectively.Tree height,DBH,crown and timeber volume of forest applied with the fertilizer increased by 6.3%-26.6%,14.7%-37.2%,6.5%-18.8% and 42.9%-136.7% respectively.Among them,compound fertilizer with 500 g special humic acid for Eucalyptus and 10 g compound microbial agent as basal fertilizer and 500 g No.2 special humic acid for Eucalyptus dressing as dressing had the best effects on cold resistance and growth stimulation.It was an ideal fertilizer for Eucalyptus dunnii in the north of Fujian.