期刊论文

中文

湖南农业大学学报(自然科学版)

1007-1032

2000

26

5

352-354

10.3321/j.issn:1007-1032.2000.05.009

湖南省科委攻关项目;湖南省烟草公司资助项目

本校为第一机构

为探明钾肥施用方法、土壤供钾能力和对钾的吸收之间的内在关系 ,为烤烟生产合理分配和施用钾肥提供依据 ,以湖南烟区主要植烟土壤——石灰岩母质发育的红壤性水稻土为供试土壤 ,采用盆栽土培方法 ,研究了施钾方法对土壤供钾能力及烤烟钾累积的影响 .结果表明 :烟苗移栽后 30 d施用总施钾量的 40 % ,能够使土壤对生长发育中后期的烤烟维持较高的供钾能力 ,土壤速效钾和缓效钾含量比钾肥一次性作基肥施用的处理分别提高了5 7.4%～ 6 0 .9%和 5 .7%～ 6 .2 % ,同时可促进烤烟对钾的吸收与累积 ,使烟株的总吸钾量提高 5 .0 %和 15 .5 % ,烟叶的含钾量提高了 4.6 %和 12 .2 % .

A plot experiment was conducted by using the method of plot culture and the main tobacco soil in Hunan-red earth paddy soil,developing from limestone matrix,as the experimental soil.The results show that applying 40% of total potassium 30 d after transplanting,the supply capability of soil potassium keeps at a high level at mid stage and late stage of tobacco growth.The contents of quick acting available potassium and slow acting available potassium in soil increase by 57.4%~60.9% and 5.7%~6.2% respectively compared with the treatment that potassium fertilizer is applied in a once for all meth...