【摘要】 麻竹是广西喀斯特坡地石漠化治理的一个主要树种,具有显著的生态效益、经济效益和社会效益。为了充分发挥麻竹的三大效益,研究基于广西喀斯特坡地立地条件特点,以尿素、钙镁磷肥、沸石等3种肥料为试材,采用正交试验设计,对马山县喀斯特石山坡地麻竹人工纯林进行施肥试验,分析施肥对新竹高度、胸径、杆重、枝重、叶重、地上总生物量和母竹平均出笋量的影响,探讨喀斯特石山坡地麻竹施肥效果。结果表明:施用一定配比的尿素、钙镁磷肥、沸石后,对母竹平均出笋量、新竹高度、胸径、杆重、枝重、叶重、地上总生物量等均有显著影响,施用尿素1 000 g/标准丛+钙镁磷肥4 000 g/标准丛可极显著地提高母竹出笋量(0.62个/母竹);施用尿素500 g+钙镁磷肥1 000 g+沸石5 000 g/标准丛极显著提高单位面积新竹杆重、枝重、叶重和地上总生物量,分别达10.668、2.532、1.103、14.303 t.hm-2,为不施肥处理的7.5倍、18.3倍、5.7倍、8.1倍,扣除用工费后,利润比不施肥的处理增加641.5%,增益6 121元.hm-2。更多还原

【Abstract】 Dendrocalamus latiflorus is one of the principal tree species to control Karst rocky desertification in Guangxi Province,having remarkable ecological,economic,and social benefits.In order to give full play of these benefits,an orthogonal test was conducted in D.latiflorus groves in Mashan County,using urea,calcium magnesium phosphate and zeolite as fertilizers.The height,diameter at breast-high,culm weight,brunch weight,leaf weight,above-ground biomass of the new bamboos and the average number of bamboo shoots were measured.The results showed that the fertilizing effects were significant.The number of bamboo shoots has remarkably increased,a fertilizing dosage of urea 1000 g and calcium magnesium phosphate 4000 g per standard cluster has increased sprouting rate to 0.62 bamboo shoots per mother bamboo shoot.A fertilizing dosage of urea 500 g,calcium magnesium phosphate 1000 g and zeolite 5000 g per standard cluster has dramatically improved weight culm,brunch,leaf biomass and above-ground biomass of the new bamboos,amounting to 10.668 t·hm-2,2.532 t·hm-2,1.103 t·hm-2,and 14.303 t·hm-2 respectively,which were 7.5,18.3,5.7,and 8.1 times of the unfertilized one.After deducting manpower fee,the profit was 641.5% higher than that of the unfertilized one,increasing revenue of 6 121 yuan per hectare.更多还原