摘要
土壤pH低,酸化严重是湛江蔗区甘蔗生产的产要限制因子之一。为了提高甘蔗产量,改善酸性土壤障碍因素,采用土壤培养试验与甘蔗盆栽试验相结合,研究了施用石灰对酸性土壤养分状况和甘蔗产量、糖分的影响。土壤培养试验结果表明:石灰施用量与供试酸性土壤pH、氮、钙、镁、硫、硅等有效含量呈显著正相关,而与铁、锰的有效性呈显著负相关,说明通过合理施用石灰,可以显著提高土壤pH和改善土壤各有效养分状况,从而提高酸性土壤生产力。桶栽试验结果也表明:在湛江蔗区强酸性土壤上,合理施用石灰可以提高甘蔗产量和糖分,当每千克土壤施用石灰1.2g,甘蔗产量和糖分分别比对照提高14.2%和2.4%,当石灰施用过多,单位石灰增施量对蔗茎产量和糖分表现出负效。
Low pH and severe acidification was a major constraint to sugarcane productivity in the sugarcane region of Zhanjiang.In order to improve the sugarcane production and modify the acid soil limiting factors,the effect of applying lime in acid soil on soil properties and the yield,sugar content in sugarcane was examined by using the soil culture experiment and pot experiment.The results of the soil culture experiment showed that the lime applied was significantly positive correlated with the pH value and the availability of nitrogen,calcium,magnesium,sulfur,silicon,but the availability of iron,manganese was significantly negatively correlated in the test soil.It was means that the rational application of lime in acid soil can increase soil pH value and improve the available nutrients so that improve the acidic soil productivity.The results of pot culture experiment also showed that lime applied in acid soil,the yield and sugar content of sugarcane improved significantly,As one kilogram soil supplied with 1.2 gram lime,the cane yield and sugar content were increased by 14.2% and 2.4%.But when lime application too much,the unit of increase the amount of lime on cane yield and sugar content showed a negative effect.
出处
《中国农学通报》
CSCD
北大核心
2010年第15期266-269,共4页
Chinese Agricultural Science Bulletin
基金
国家甘蔗产业体系建设"营养与栽培功能研究室"(nycytx-024-01-12)
广东省科技计划项目"能源甘蔗产业推进关键技术研究与示范"(2008A020100005)
农业部公益性行业(农业)科研专项"糖能兼用甘蔗品种筛选及配套技术示范与应用"(nyhyzx07-019)
关键词
土壤
PH
石灰
有效养分
甘蔗
soil
pH
lime
available nutrients
sugarcane
