|
|||||
|
|
| 湖南省晚稻施钾效应及土壤速效钾丰缺指标研究 | |
| 引用本文： | 鲁艳红,廖育林,罗尊长,聂军,黄铁平,夏海鳌.湖南省晚稻施钾效应及土壤速效钾丰缺指标研究[J].安徽农业科学,2011,39(6):3392-3394. |
| 作者姓名： | 鲁艳红 廖育林 罗尊长 聂军 黄铁平 夏海鳌 |
| 作者单位： | 1. 湖南省土壤肥料研究所,湖南长沙410125;湖南农业大学资源与环境学院,湖南长沙410128;农业部望城红壤水稻土生态环境重点野外科学观测实验站,湖南长沙410125 2. 湖南省土壤肥料研究所,湖南长沙,410125 3. 湖南省土壤肥料研究所,湖南长沙410125;农业部望城红壤水稻土生态环境重点野外科学观测实验站,湖南长沙410125 4. 湖南省土壤肥料工作站,湖南长沙,410005 |
| 基金项目： | 国家"十一五"科技支撑计划，湖南省农业科学院科技创新项目 |
| 摘 要： | 目的]研究钾肥对晚稻产量、经济效应的影响,建立湖南省晚稻土壤速效钾的丰缺指标。方法]2005~2008年在湖南省湘北、湘中-湘东及湘南3个地区的稻田土壤上共布置159个钾肥晚稻田间试验。结果]晚稻施钾有明显的增产及增收效应,3个地区晚稻施钾平均增产803~871 kg/hm2,平均增产率为13.1%~13.7%;施钾平均增加利润704.01~798.39元/hm2,平均产投比1.94~2.31。施钾增产趋势及经济回报均随土壤速效钾含量的提高而减缓或降低。晚稻种植体系中,湘北区土壤速效钾＂低＂、＂中＂、＂高＂丰缺指标分别为〈45.8、45.8~143.0和〉143.0 mg/kg;湘东-湘中区分别为〈42.9、42.9~125.2和〉125.2 mg/kg;湘南分别为〈38.8、38.8~139.1和〉139.1 mg/kg。结论]湖南省晚稻种植体系中,严重缺钾土壤较少,土壤钾素主要为中等水平,8%左右的土壤速效钾含量较高。 |
| 关 键 词： | 湖南省 晚稻 钾肥效应 土壤速效钾 丰缺指标 |
Study on Response of Late Rice to K Application and Abundance and Deficiency Indices of Soil Available K in Hunan Province |
|
| Institution: | LU Yan-hong et al(Soil and Fertilizer Institute of Hunan Province,Changsha,Hunan 410125) |
| Abstract: | Objective] The objective of this research was to investigate the effect of K on late rice yield and profit,and determine abundance and deficiency indices of soil available K.Method]159 late rice field trails of potassium fertilizer(K) application for late rice were conducted in 3 main double-rice cropping regions of Hunan Province such as the south region,the east-central region and the north region during 2005-2008.Result]K fertilizer application increased the yield and the profit of late rice compared with no K application significantly.The average increase rice by K application in 3 regions was 803-871 kg/hm2,increase rate was 13.1%-13.7%,increase profit by K application was 704.01-798.39Yuan/hm2,and VCR was 1.94-2.31.There was significantly negative correlation between yield increment,VCR and soil available K.The low,medium,high indices for soil available K in the north region were <45.8 mg/kg,45.8-143.0 mg/kg and >143.0 mg/kg,and in these the east-central region were <42.9 mg/kg,42.9-125.2 mg/kg and >125.2 mg/kg,and these in the south region were <38.8 mg/kg,38.8-139.1mg/kg and >139.1 mg/kg,respectively.Conclusion]The content of available K in the main area of whole province was at medium level,and in about 8% of the whole area were at high level,only small area were at low level. |
| Keywords: | Hunan Province Late rice Response to K application Soil available K Abundance and deficiency indices |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |