摘要
利用盆栽试验,采用完全随机区组设计,以晋谷21为供试品种,以尿素和ZnSO4·7H2O为供试肥料,设4个氮肥水平(0、120、180、240kg/hm^(2))和3个锌肥水平(20、40、80mg/L),研究了氮锌配施对谷子根系形态及锌含量的影响。结果表明,同一氮水平不同锌水平及同一锌水平不同氮水平处理下,喷施锌肥后7d和15d,谷子根长、投影面积、表面积和根尖数等根系形态指标均随着施锌、氮浓度的增加呈先上升后下降趋势。与单施锌肥相比,增施氮肥可有效增加谷子根系各形态指标,N0Zn40和N120Zn40处理根系各形态指标值均较大。N120Zn40处理与同氮、同锌水平下的其他处理相比,谷子根系活力显著上升,根冠比也有所增加,整体表现出较强的活性。喷施锌肥后15d,谷子根系锌含量在低氮和中氮条件下随着施锌浓度的增加呈升高趋势;N120Zn40处理谷子根系锌含量比同一锌水平不同氮水平的其他处理分别显著增加了76.00%、47.22%和15.43%。适宜比例的氮锌肥配施具有良好的协同效应,而氮120kg/hm^(2)、锌40mg/L为本试验条件下最佳配施组合。
With pot experiment and complete randomized block design,Jingu 21 was used as material,urea and ZnSO4∙7H2O as the fertilizer,the effects of nitrogen and zinc application on root morphology and zinc content in foxtail millet were studied by using four nitrogen fertilizer levels(0,120,180 and 240kg/ha),and three zinc fertilizer levels(20,40 and 80mg/L).The results showed that,under different zinc treatment levels of the same nitrogen level and different nitrogen treatment levels of the same zinc level,seven and 15 days after zinc fertilizer injection,root length,projection area,surface area and root tip number all rose and then declined with the increase of zinc and nitrogen concentration.Compared with single application of zinc fertilizer,increasing nitrogen fertilizer could effectively increase the morphological index of foxtail millet root system,and the values of root forms of N0Zn40 and N120Zn40 treatments were large.The root activity of N120Zn40 treatment increased significantly compared with other treatments at the same nitrogen and zinc levels,and the root-shoot ratio also increased,which showed strong activity.At 15 days after zinc spraying,the zinc content of root increased with the increase of zinc concentration under low nitrogen and medium nitrogen;the zinc content of N120Zn40 treatment increased by 76.00%,47.22%and 15.43%compared with other treatments with different nitrogen levels at the same zinc level.Therefore,the appropriate proportion of nitrogen and zinc fertilizer dispensing had a good synergistic effect,while nitrogen 120kg/ha and zinc 40mg/L were the best dispensing combination under this test condition.
作者
赵海燕
赵丽洁
韩根兰
王江
王子建
聂萌恩
杜慧玲
原向阳
董淑琦
Zhao Haiyan;Zhao Lijie;Han Genlan;Wang Jiang;Wang Zijian;Nie Meng’en;Du Huiling;Yuan Xiangyang;Dong Shuqi(College of Agronomy,Shangxi Agricultural University,Jinzhong 030801,Shanxi,China)
出处
《作物杂志》
北大核心
2023年第4期152-158,共7页
Crops
基金
山西省重点研发计划项目(201903D221050)
山西省留学人员科研资助项目(2020-060)
山西农业大学学术恢复科研专项(2020xshf42)
国家现代农业产业技术体系项目(CARS-06-14.5-A28)
山西省现代农业产业技术体系谷子体系建设项目(GZTX202217)。
关键词
谷子
锌含量
氮锌配施
根系形态
Foxtail millet
Zinc content
Nitrogen and zinc application
Root morphology
