湖北农业科学2026，Vol.65Issue(2)：57-62,6.DOI:10.14088/j.cnki.issn0439-8114.2026.02.009
添加石灰对西南喀斯特地区富硒土壤硒的赋存形态及高粱硒积累的影响
Effects of lime application on selenium speciation in selenium-rich soil and selenium accumulation in sorghum in the Southwest karst region
摘要
Abstract
Aiming at the problem of high selenium content but low bioavailability in selenium-rich soil in the Southwest karst region,a pot experiment was conducted with treatments of no lime application(CK)and five lime application gradients(T1～T5,adding 5,10,20,30,40 g lime per 9 kg soil,respectively)to explore the effects on soil pH,selenium speciation transformation,selenium avail-ability,and selenium uptake and accumulation in sorghum.The results showed that lime application increased soil pH,promoted the transformation of organically combined selenium to water-soluble selenium and exchangeable selenium,and increased the content of available selenium in soil.Appropriate lime application significantly enhanced the accumulation levels of selenium in sorghum roots and grains,with the maximum increase reaching 78.57％and 67.19％,respectively.Correlation analysis indicated that the content of available selenium in soil was a key factor affecting selenium uptake in sorghum,showing a strong positive correlation with selenium content in roots and grains.The selenium content in roots had a strong negative correlation with the content of organically combined se-lenium,while the selenium content in grains had a weak correlation with organically combined selenium.In the tested acidic selenium-rich soil,applying 20～30 g lime(per 9 kg soil)effectively improved the bioavailability of selenium and promoted selenium accumula-tion in crops,and in practical application,this dosage range could be referred to with adaptive adjustments based on the specific acid-ic characteristics of the soil.关键词
石灰/富硒土壤/硒的形态/高粱硒积累/西南喀斯特地区Key words
lime/selenium-rich soil/selenium speciation/selenium accumulation in sorghum/Southwest karst region分类
农业科技引用本文复制引用
郭双燕,游茜,舒汶,张君臣,张南,潘昌滨,潘自平..添加石灰对西南喀斯特地区富硒土壤硒的赋存形态及高粱硒积累的影响[J].湖北农业科学,2026,65(2):57-62,6.基金项目
茅台学院大学生创新创业训练计划项目(S2024146251780 （）
S2024146251788) （）
茅台学院高层次人才科研启动经费项目(mygccrc[2022]064 （）
mygccrc[2022]070) （）
