摘要
[目的]查明云南省牟定县主植烟区的土壤肥力状况,为土壤改良和烟草平衡施肥提供理论依据。[方法]对该县的3个主植烟区120个土壤样品养分进行检测分析。[结果]牟定植烟土壤平均pH为6.05,处于弱酸性至中性范围;有机质含量为11.10~88.40g/kg,平均为37.67g/kg,含量较丰富;土壤速效氮含量为52.40~282.17mg/kg,基本处于中等偏上水平;速效磷含量为5.26~52.82mg/kg,整体处于中等至丰富水平,但不同地点差异较大;土壤速效钾含量为25.60~228.91mg/kg,基本处于低等水平;土壤交换性镁含量为37.00~868.09mg/kg,95.00%的土壤样品高于50mg/kg的缺镁临界指标;植烟土壤有效硼含量为0.14~1.27mg/kg,20.00%的样品低于缺硼临界值(〈0.50mg/kg)。土壤水溶性氯含量范围为1.30~68.24mg/kg,87.50%的土壤样品水溶性氯含量低于30.00mg/kg,基本处于适宜的范围内。l结论l牟定主要植烟区在平衡施肥时应注重控氮,增施磷肥和钾肥,补施有机肥、镁肥和硼肥。
[ Objective J The soil fertility situations were investigated to provide the theory basis on soil improvement and balanced fertilization in main tobacco-growing areas of Mouding Region, Yunnan Province. [ Method] 120 soil samples from 3 main tobacco-growing areas were an- alyzed. [ Resuh] The average pH was 6.05, which was in an appropriate amount for tobacco growth. The range of organic matter content was 11. 10 - 88.40 g/kg, and was rich in general. The contents of available nitrogen and available phosphorus were in the medium to high levels, reaching 52.40 - 282.17 and 5.26 - 52.82 mg/kg respectively. But the content of available potassium was 25.60 - 228.91 mg/kg, basically in the low level. The content of soil exchangeable magnesium was 37.00 - 868.09 mg/kg, and 95.00% of the samples was higher than the critical index(50 mg/kg). The range of soil available boron content was 0.14 - 1.27 mg/kg, and 20.00% of samples was below the boron critical index ( 〈 0.50 mg/kg). The range of water-soluble chloride content was 1.30 - 68.24 mg/kg, and 87.50% of soil samples was lower than the critical index (30.00 mg/kg). [ Conclusion ] More attention should be paid in balanced fertilization in Mouding tobacco-growing are-as, which was controlling nitrogen fertilizer, supplying phosphorus and potassium fertilizer and increasing organic matter, magnesium, and bo-ron fertilizer.
出处
《安徽农业科学》
CAS
2013年第19期8158-8162,共5页
Journal of Anhui Agricultural Sciences
基金
贵州中烟工业有限责任公司科技项目(201114)
关键词
牟定
烟区
土壤肥力
评价
Mouding
Tobacco-growing areas
Soil fertility
Evaluation