南方坡岗地土壤中不同矿质营养元素用量对甘蔗苗期生长的影响研究  

Effects of different mineral nutrients application to sugarcane seedlings growth in South China slope land soils

作　　者：黄旭[1,2] 唐拴虎[1] 陈建生[1] 黄巧义[1] 李晓辉[3] 徐培智[1] 

机构地区：[1]广东省农科院土壤肥料研究所/广东省养分资源循环利用与耕地保育重点实验室,广东广州510640 [2]华南农业大学农学院,广东广州510642 [3]华南师范大学,广东广州510631

出　　处：《广东农业科学》2010年第6期70-73,共4页Guangdong Agricultural Sciences

基　　金：国家科技支撑计划项目(2008BADA4B10);广东省科技计划项目(2009B020311002)

摘　　要：对N、P、K、Ca、Mg、S、Cu、Zn、B、Mn10种元素不同用量在南方坡岗地土壤甘蔗苗期生长上的影响进行研究。结果表明:N、Mg、S、B肥对促进甘蔗苗期生长效果明显,施用3倍养分临界值的N、Mg、S、B处理生物量最多、茎杆最粗、叶绿素含量最高;施用P、K肥对甘蔗苗期生长有一定促进作用,但甘蔗苗期生长所需P、K量相对不多;施用Ca、Cu、Zn、Mn肥对甘蔗苗期生长无明显促进效果;施用6倍养分临界值水平的各元素处理均对苗株产生抑制生长作用。This paper studied the effects of different mineral nutrients amount （N,P,K,Ca,Mg,S,Cu,Zn,B,Mn） on sugarcane seedlings growth in South China slope land soils. The result indicated that, the effects of N, Mg, S, B fertilizer on promoting the growth of sugarcane seedlings was significant. The N, Mg, S, B fertilizers treatment in application the three times of the nutrient threshold had the most live weight, the thickest stalks, and the highest SPAD value. P, K fertilizers had some role in promoting the sugarcane seedlings growth, but the P, K nutrient demand of the sugarcane seedlings growth few. And the effects of Ca,Cu,Zn,Mn fertilizer on promoting the growth of sugarcane seedlings was not significant. All treatments in application the six times of the nutrient threshold inhibited the growth of the sugarcane seedlings.

关 键 词：甘蔗 苗期 南方坡岗地 养分临界值 

分 类 号：S143.7[农业科学—肥料学] S566.1[农业科学—农业基础科学]