桉树与环境

本文收集了国内外的一些桉树与环境关系的研究资料，依据众多的研究成果分别从桉树与水分，桉树与土壤养分，桉树水土保持，桉与其它生物的关系等方面论述了桉树与环境的相互关系；     

融水县桑蚕如何饲养能获得高产高效分析

我国是一个桑蚕养殖大国,桑蚕饲养也是我国传统农业的重要组成部分,农业科技的快速发展给桑蚕养殖的高产高效提供了可能,本文着重以融水县桑蚕养殖为例,分析桑蚕的生理特性,针对性探索桑蚕饲养技术,提出确保桑蚕养殖高产高效的举措。     

蓝桉,直干桉工业原料林经济效果分析

按经营纤维用材为主，合理利用桉叶，主伐后实行萌芽更新的经营模式营造蓝桉，直干桉工业原料林，第１个实林轮伐斯净现值为５０５９元／ｈｍ＾２内部收益率为３５．６％，费用效益比为１．５９。经济效益显著，抗风险能力强，是建立短期轮伐工业原料的较佳选择。     

Study on the Effect of Fertilization on Eucalyptus globulus Plantation in Yunnan

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.