欢迎访问《中国农学通报》,

中国农学通报 ›› 2021, Vol. 37 ›› Issue (6): 30-36.doi: 10.11924/j.issn.1000-6850.casb2020-0159

所属专题: 玉米 烟草种植与生产

• 农学·农业基础科学 • 上一篇    下一篇

氮肥施用量对甜玉米糖分含量及农艺性状的影响

季贞希(), 崔玉涛, 陈昊东, 陈缘, 代军, 张彪, 周俊, 李美, 陈有君, 王弢, 胡小康()   

  1. 大理大学农学与生物科学学院,云南大理 671003
  • 收稿日期:2020-06-08 修回日期:2020-08-14 出版日期:2021-02-25 发布日期:2021-02-24
  • 通讯作者: 胡小康
  • 作者简介:季贞希,女,1998年出生,江苏徐州人,本科,研究方向:园艺植物养分管理。通信地址:671003 云南省大理市古城弘圣路2号 大理大学古城校区农学与生物科学学院301室,Tel:0872-2219030,E-mail:Jixixi0704@163.com
  • 基金资助:
    国家自然科学基金项目“植物经济谱对植物残体碳和养分元素释放速率的影响”(41963007);云南省科技厅地方本科高校基础研究联合专项青年项目“大麦氮肥利用及流失与农田可持续性的生态权衡研究”(2019FH001-105)

Nitrogen Fertilizer Application Rate and Sweet Corn: Effects on Sugar Content and Agronomic Traits

Ji Zhenxi(), Cui Yutao, Chen Haodong, Chen Yuan, Dai Jun, Zhang Biao, Zhou Jun, Li Mei, Chen Youjun, Wang Tao, Hu Xiaokang()   

  1. College of Agriculture and Biological Sciences, Dali University, Dali Yunnan 671003
  • Received:2020-06-08 Revised:2020-08-14 Online:2021-02-25 Published:2021-02-24
  • Contact: Hu Xiaokang

摘要:

为了阐明氮肥施用量对甜玉米糖分含量及农艺性状的影响,以甜玉米品种‘耘甜8号’为试材开展田间实验,设置5个氮肥施用量处理(即0、100、200、300、400 kg N/hm2)。结果表明,氮肥施用量与可溶性糖及还原糖含量的线性模型不显著,只是在播种后的第103天,还原糖含量随施氮量的增加而微弱下降。穗重以渐近增长的模式响应氮肥施用量的增加。施氮量超过100 kg N/hm2时,穗重对氮肥施用的正响应程度将显著减弱。每公顷增施100 kg N导致穗长降低0.29 cm。氮肥施用量与穗粗、穗行数及行粒数之间的线性模型不显著。增施氮肥能降低凸尖长度。综上所述,增加氮肥施用量对甜玉米糖分含量、穗粗、穗行数及行粒数无影响,且导致穗长微弱降低。然而,增施氮肥能显著增加穗重,且能降低凸尖长度。

关键词: 甜玉米, 氮肥, 可溶性糖, 还原糖, 农艺性状, 洱海流域

Abstract:

To elucidate the effects of nitrogen fertilizer application rate on sugar content and agronomic traits of sweet corn (Zea mays L. var. saccharata Bailey), a field experiment was conducted with sweet corn variety “Yuntian 8” as the material, and five treatments were set up with nitrogen fertilizer application rate of 0, 100, 200, 300 and 400 kg N/hm2. The results showed that, the linear models of the relationship between nitrogen fertilizer application rate and soluble sugar content and reducing sugar content were not significant, only on the 103rd day after sowing, the reducing sugar content decreased slightly with the increase of nitrogen fertilizer application rate. The response of ear weight to the increase of nitrogen fertilizer application rate presented an asymptotic growth model. When nitrogen application rate exceeded 100 kg N/hm2, the extent of the positive response of ear weight to nitrogen application decreased dramatically. Each increment of 100 kg N/hm2 decreased the ear length by 0.29 cm. The linear models of the relationships between nitrogen fertilizer application rate and ear diameter, ear row number and grain number per row were not significant. Increasing nitrogen fertilizer application rate could decrease bare tip length. Taken together, increasing nitrogen fertilizer application rate could not affect sugar content, ear diameter, ear row number and grain number per row of sweet corn, and slightly decrease ear length. However, increasing nitrogen fertilizer application rate could significantly increase ear weight and decrease bare tip length.

Key words: sweet corn, nitrogen fertilizer, soluble sugar, reducing sugar, agronomic trait, Erhai watershed

中图分类号: