摘要
目的 探究不同的氮素种类对牛大力生长及其产量性状的影响,为牛大力大田栽培中的肥料合理使用提供理论指导.方法 以"广泽一号"牛大力为研究对象,采用温室盆栽方式,进行不同的氮素处理:磷酸一铵(T,)、硫酸铵(T2)、硝酸钙(T3)、尿素(T4),以施用清水为对照(T0),对其农艺性状、光合参数、生理指标、根系生长指标进行观察和检测.结果 硫酸铵能显著增强牛大力叶片净光合速率,促进其侧根的形成及膨大,其处理的根鲜重、膨大根鲜重及干重、膨大根条数、根长、地上鲜重皆为最大,较对照分别显著增加了 31.79％、24.48％、29.51％、71.18％、6.93％、27.29％.硫酸铵、硝酸钙均显著提高牛大力叶片可溶性糖、可溶性蛋白含量,增强其硝酸还原酶(NR)与谷氨酰胺合成酶(GS)活性,硝酸钙的根系生长指标均与对照无显著差异.结论 硫酸铵对牛大力的生长及根系膨大具有良好的促进作用.
Abstract
Objective To provide theoretical guidance for the rational use of fertilizer in field cultivation of Callerya speciosa,the effects of different nitrogen types on the growth and yield traits were studied.Methods Callerya speciosa variety of'Guangze No.1'was used as materials for the research,with the potting experiment in greenhouse,different nitrogens trmeats:monoammonium phosphate(T,),ammonium sulfate(T2),calcium nitrate(T3),urea(T4),water without nitrogen(T0)as control,and the morphology,photo-synthetic parameters,physiological indexes and root growth indexes were observed and detected.Results Ammonium sulfate(T2)can significantly enhance the net photosynthetic rate,promote the formation and expansion of lateral roots.And the roots fresh weight,ex-panded root fresh weight and dry weight,number of expanded root,root length and up-ground part fresh weight,were 31.79％,24.48％,29.51％,71.18％,6.93％,27.29％significantly higher than T0,and higher than other treatments.Ammonium sulfate(T2)and calcium nitrate(T3)can significantly increase the soluble sugar content soluble protein content of Callerya speciosa,strengthen the ac-tivities of nitrate reductase(NR)and glutamine synthetase(GS),but the root growth indexes of calcium nitrate(T3)were not signif-icant difference with the control(T0).Conclusion Ammonium sulfate had nice promotive effect on the growth and root enlargement of Callerya speciosa.
基金项目
国家自然科学基金地区基金(82060685)
广西重点研发计划项目(桂科AB16380210)
广西自然科学基金(2022GXNSFAA035497)
广西科技重大专项项目(桂科AA17204056-3)
国家科技期刊平台
NSTL
万方数据