湘西植烟土壤养分管理分区研究
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摘要
为研究湘西植烟区域土壤养分特征和分区状况,采用GPS和模糊c均值聚类相结合的方法,对湘西植烟土壤主要养分进行管理分区。结果表明:(1)湘西植烟土壤有机质含量偏高,有效磷含量极高,全氮、碱解氮和速效钾的含量均为中等水平,各项养分指标均为中等程度变异。(2)通过相关分析筛选法,选取有机质、全氮、碱解氮、有效磷和速效钾作为养分管理分区指标。(3)湘西烟区可划分为3个养分管理分区,第1分区的特点是适氮、超高磷、高钾;第2分区的特点是适氮、适磷、低钾;第3分区的特点是适氮、高磷、钾素适宜。3个分区间有11项土壤养分指标含量差异显著或极显著。
To study the soil nutrient characteristics and zoning of tobacco planting area in Xiangxi,Using the method of combining GPS and fuzzy c-means clustering,management zoning of main nutrients of tobacco planting soil in Xiangxi,Hunan province.The results show that:(1)The content of organic matter in soil of Xiangxi was high,the content of effective phosphorus was very high,and the content of total nitrogen,alkaline nitrogen and available potassium were medium level,all the above nutrient indexes showed moderate variation.(2)Through correlation analysis and screening,organic matter,total nitrogen,alkali-hydrolyzed nitrogen,available phosphorus and available potassium were selected as the zoning indexes of nutrient management.(3)Xiangxi tobacco area can be divided into three nutrient management zones. The characteristics of the first zone are suitable nitrogen,ultra-high phosphorus and high potassium;The characteristics of the second zone are suitable nitrogen and phosphorus and low potassium;The characteristics of the third zone are suitable nitrogen,high phosphorus and suitable potassium. There were significant or extremely significant differences in the contents of 11 soil nutrient indexes among the three zones.
To study the soil nutrient characteristics and zoning of tobacco planting area in Xiangxi,Using the method of combining GPS and fuzzy c-means clustering,management zoning of main nutrients of tobacco planting soil in Xiangxi,Hunan province.The results show that:(1)The content of organic matter in soil of Xiangxi was high,the content of effective phosphorus was very high,and the content of total nitrogen,alkaline nitrogen and available potassium were medium level,all the above nutrient indexes showed moderate variation.(2)Through correlation analysis and screening,organic matter,total nitrogen,alkali-hydrolyzed nitrogen,available phosphorus and available potassium were selected as the zoning indexes of nutrient management.(3)Xiangxi tobacco area can be divided into three nutrient management zones. The characteristics of the first zone are suitable nitrogen,ultra-high phosphorus and high potassium;The characteristics of the second zone are suitable nitrogen and phosphorus and low potassium;The characteristics of the third zone are suitable nitrogen,high phosphorus and suitable potassium. There were significant or extremely significant differences in the contents of 11 soil nutrient indexes among the three zones.
引文
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[3]刘卉,周清明,黎娟,等.生物炭施用量对土壤改良及烤烟生长的影响[J].核农学报,2016,30(07):1411-1419.
[4]李强,戴美玲,向德明,等.湘西喀斯特区植烟土壤有效磷时空变异及风险评估[J].土壤,2018,50(01):181-189.
[5]程江珂,王胜男,廖允成.攀枝花市优质烤烟施肥模型研究[J].云南农业大学学报(自然科学),2017,32(02):263-268.
[6]刘青丽,李志宏,徐艳丽,等.基于移栽期、施肥和品种的云南烤烟协同调控技术研究[J].作物杂志,2016(6):128-134.
[7]张明发,田峰,李孝刚,等.基于烤烟生产的湘西植烟土壤质量综合评价[J].中国烟草学报,2017,23(3):87-97.
[8]胡瑞文,黎娟,向德明,等.湘西州花垣烟区植烟土壤肥力适宜性评价及影响因素[J].云南农业大学学报(自然科学),2018,33(03):520-528.
[9]唐春闺,李帆,向世鹏,等.浏阳植烟区土壤主要养分的空间分布及管理分区[J].贵州农业科学,2016,44(10):58-61.
[10]邓小华,覃勇,陆中山,等.湘西烟叶的香型香韵及其区域分布特征[J].烟草科技,2014(07):79-84.
[11]鲁如坤.土壤农业化学分析方法[M].北京:中国农业科技出版社,2000.
[12]刘勇军,黎娟,唐春闺,等.宁乡植烟土壤养分空间变异及丰缺评价[J].安徽农业科学,2018,46(08):129-132.
[13]刘逊.湘西烟区气候与土壤环境特征及其对烟草品质的影响[D].长沙:湖南农业大学,2014.