红壤丘陵湿地松造林施肥的效应研究初报  

GROWTH RESPONSE OF P.ELLIOTTII PLANTATION TO FERTILIZATION:TWO YEARS’RESULTS

作　　者：胡炳堂[1] 洪顺山[1] 李祖勋 肖齐绪 袁润根 

机构地区：[1]中国林科院亚热带林研所,江西省永丰县林业局

出　　处：《江西农业大学学报》1995年第1期45-52,共8页Acta Agriculturae Universitatis Jiangxiensis

基　　金：林业部世界银行贷款国家造林项目

摘　　要：在江西省永丰县第四纪红色粘土发育的红壤丘陵，营造湿地松林进行施肥试验。两年的结果初步表明，造林时施肥的当年就有明显肥效，并且延续到第２年，使地径总生长量较对照增加４２％～７０％、树高增长５１％～６４％、冠幅增大４０％～７８％。在各施肥处理中，以ＮＰＫ完全肥料的效果最佳，ＮＰ配施的效果为其次；ＰＫ配合与ＮＰ相当或略别；再次为单施Ｐ与对照均有极显著差异。在本试验区土壤条件下，施Ｐ＿２Ｏ＿５２５ｋｇ／ｈｍ￣２时，剂量已足够；单施Ｎ会使湿地松当年生长量减少，减少幅度随施Ｎ量的提高明显加大，单施Ｋ对生长无明显作用。钙镁磷肥用于造林时施基肥和第２年追肥都有明显肥效，但作基肥明显优于追肥。施肥对湿地松的造林成活率无显著影响，施Ｎ会使之稍有下降。A fertilization trial of Pinus elliottii plantation was established on the red earth devebpedfrom the Quarternary red clay in Yonfeng County,Jiangxi Plovince.Two years’investigationshowed that:1.The effectiveness of fertilization was tangible in the first year of planting andIasted to the second year.The total increments of groundline diameter(GLD),height(H)andcrown width(CW)of the treatment pfots were 42 %～70 %,51 %～64% and 40%～78 %higher than those of the check plots,respectively.2.The growth response to NPK ( 50 kg/yhm￣2 of N,P_2O_5,K_2 O)with the average increments(2a)of GLD,H,CW was the best of all,being 2.32 cm,0.756 m,0.613 m,which were increased by 84%,73%,101 % over CK of1.26 cm,0.438 m,0.307 m. Next was that to NP or PK,Which was between those to NPKand P.The growth response to P was very siguificant.The yearly growth of GLD was premot-ed by over 66%(1a)and 37%(2a),and H was promoted by more than 26% and 74% andCW was broadened by 59% over CK. 25kg/hm￣2 of P_2O_5 was enough under the soil conditionin this test.When only N was applied ,the growth was decreased making only 84 %～97% and64%～67% of that of CK resulting from the application of 50 and 100kg/hm￣2. There was noobvious response to K.3.By comparison the effect of using calcium magnesium phosphate asbasal ferrilizer was siginificiently better than that of using it as top dressing,the basal ferrilizerbrought about 40%( GLD)and 13 %～30 %(H)more increments than top dressing.4.Thefertilization before planting had hardiy any effect on the survival percent,but the application ofNdecreased the survival rate by 2%～8%.

关 键 词：湿地松 造林施肥 红壤丘陵 效应 

分 类 号：S791.246[农业科学—林木遗传育种]