辽宁省稻田土壤供钾状况研究 |
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引用本文: | 邱卫文,谭成君,雷永振,王祥珍,赵凯.辽宁省稻田土壤供钾状况研究[J].土壤通报,2003,34(4):302-307. |
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作者姓名: | 邱卫文 谭成君 雷永振 王祥珍 赵凯 |
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作者单位: | 1. 沈阳农业大学土地资源与环境学院,辽宁,沈阳,110161;辽宁省农科院土肥所,辽宁,沈阳,110161 2. 沈阳农业大学土地资源与环境学院,辽宁,沈阳,110161 3. 辽宁省农科院土肥所,辽宁,沈阳,110161 |
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基金项目: | 中国—加拿大政府第三期农事合作项目,加拿大钾磷研究所(PPI/PPIC),加拿大钾肥公司(CANPOTEX)资助 |
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摘 要: | 据测定,辽宁省水稻土速效钾、缓效钾的平均含量均以盘锦、营口地区的盐渍型水稻土为最高,其次是东港地区盐渍型、淹育型和潜育型水稻土以及铁岭地区淹育型水稻土,最低的是沈阳地区淹育型水稻土。各地区水稻土的供钾强度(Ⅰ)、供钾容量(Q)以及供钾缓冲力(Q/I),均按上述地区顺序依次递减。出现这些差异,是由于土壤成土母质、粘土矿物类型、钾肥用量、灌溉水水质以及土壤基本性质,诸如粘粒含量、阳离子交换量、pH值等因素不同而造成的。盘锦、营口稻区水稻土在这几方面都占优势。
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关 键 词: | 水稻土 速效钾 缓效钾 缓冲容量 |
文章编号: | 0564-3945(2003)04-0302-06 |
修稿时间: | 2001年5月3日 |
Study on the Status of K-supply of Paddy Soil in Liaoning Province |
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Abstract: | The mean contents of readily available potassium and slowly available potassium in the paddy soils (stagnic Anthrosols) of Liaoning porvince were in the order:salinized paddy soil of Pangjing and Yingkou district>salinized paddy soil,submergic paddy soil and gleyed paddy soil of Donggan district>submergic paddy soils of Tieling district>submergic paddy soils of Shenyang district.The K-supply intensity,the K-supply quantity and the K-buffer capacity were in line with the order of the mean contents of K.The K status of the paddy soil in Liaoning province vared in different districts.It is mainly due to the differences in soil-forming parent material,types of clay minerals,K fertilizer application,quality of irrigation water and soil properties. |
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Keywords: | Paddy soil Available potassium Slowly available potassium Potential buffering capacity |
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