摘要
为促使云南松 (Pinusyunnanensis)母树林早结实、多结实 ,1 992年对其进行施肥试验 .结果表明 :施尿素、过磷酸钙、硫酸钾、硼砂 ,可显著提高云南松母树球果产量 ,其中 :每株母树施尿素 40 0g的球果产量比对照提高 1 0 3% ,施过磷酸钙 5 0 0g的提高 83% ,施硫酸钾 5 0 0g的提高 70 % ,施硼砂 40g的提高 6 2 %
Growth conditions and timber quality of Pinus yunnanensis are decided by seeds'genetic characters.Because forests are afforested on wastehills where Pinus yunnanensis is distributed,many seeds are needed.How to outcome earlier and more wasn't solved by many forestry workers.Through analysing,the authors drew the conclusion that Pinus yunnanensis seed tree forests applying fertilizer could significantly increase growth incremnet of cone.Contrasted with those without applying fertilizer,cone quantity of per Pinus yunnanensis seed tree forests applying CO(NH 2) 2 400g could increase by 103%;cone quantity of per tree applying K 2SO 4 500g could increase by 70%;cone quantity of per tree applying Na 2B 4O 7.H 2O 400g could increase by 62%;cone quantity per tree applying Ca(H 2PO 4).H 2O 500 could increase by 83%.
出处
《西南林学院学报》
2000年第3期132-138,共7页
Journal of Southwest Forestry College
基金
云南省"七五"科技攻关项目(75-07-01-30)
