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中国农学通报

中国农学通报 ›› 2018, Vol. 34 ›› Issue (31): 10-18.doi: 10.11924/j.issn.1000-6850.casb18050127

所属专题： 小麦

• 农学 农业基础科学 • 上一篇    下一篇

施氮对青引1号燕麦生物量积累及其分配的影响

吴浩,刘文辉,贾志锋,梁国玲,马祥   

  1. 青海省畜牧兽医科学院,青海省畜牧兽医科学院,青海大学青海省畜牧兽医科学院,青海大学青海省畜牧兽医科学院,青海大学青海省畜牧兽医科学院
  • 收稿日期:2018-05-24 修回日期:2018-09-29 接受日期:2018-06-19 出版日期:2018-11-01 发布日期:2018-11-01
  • 通讯作者: 刘文辉
  • 基金资助:
    青海省科技厅重点实验室发展专项“青海省青藏高原优良牧草种质资源利用重点实验室”(2017-ZJ-Y12)；现代农业产业技术体系建设专 项资金“国家牧草产业技术体系海北综合试验站”(CARS-34)；青海省科技厅成果转化项目“高寒区饲用燕麦品种提纯复壮和三级繁育体系建立” (2017-NK-113)；农业部牧草种质资源保护项目“青藏高原牧草种质资源保护利用”(2130135)；青海省饲草产业科技创新平台。

Effects of Nitrogen Application on Biomass Accumulation and Allocation of Avena sativa‘Qingyin No.1’

  • Received:2018-05-24 Revised:2018-09-29 Accepted:2018-06-19 Online:2018-11-01 Published:2018-11-01

摘要： 对青引1号燕麦(Avena sativa cv. Qingyin No.1)采用不同施氮处理,探讨氮肥处理下各器官生物量积累和分配规律,以了解燕麦生物分配格局对氮肥响应机制,为燕麦合理施肥提供理论依据。结果表明：施氮显著影响了青引1号燕麦各器官生物量积累和分配,在施氮75 kg/hm<sub>2</sub>时茎、叶、穗、根和总生物量积累最高,分别达到1332.97 g/m<sub>2</sub>、375.53 g/m<sub>2</sub>、587.52 g/m<sub>2</sub>和205.20 g/m<sub>2</sub>和2501.22 g/m<sub>2</sub>；茎、叶、穗和根分配分别在30 kg/hm<sub>2</sub>、60~90 kg/hm<sub>2</sub>、90~120 kg/hm<sub>2</sub>和0~60 kg/hm<sub>2</sub>施氮处理下较高。青引1号燕麦随生育期推进,总生物量、茎、根生物量呈先慢后快的增长变化,叶生物量呈先增后降的变化,穗生物量呈持续增加的变化。乳熟期生物量分配模式表现为茎＞穗＞叶＞根；茎、叶、穗和根生物量间均呈异速生长关系,茎、穗生物量的积累高于根,而叶生物量的积累则低于根。各器官在不施肥状态下的形态可塑性高于施肥处理。

关键词: 豫北地区, 豫北地区, 自然资源, 景区, 开发模式, 权重系数

Abstract: To explore the response mechanism of biomass allocation pattern and the rational fertilization of Avena sativa‘Qingyin No.1’, different nitrogen treatments were set up. The results showed that nitrogen had significant influence on the biomass accumulation and distribution of various organs of‘Qingyin No.1’. The maximum biomass accumulation of stems, leaves, panicles, roots and total biomass was 1332.97, 375.53, 587.52, 205.20 and 2501.22 g/m2 respectively under 75 kg/hm2 nitrogen application amount. The higher biomass distribution of stems, leaves, panicles and roots was obtained under the nitrogen application amount of 30, 60-90, 90-120 and 0-60 kg/hm2, respectively. The total biomass, the biomass of stems and roots increased first rapidly and then slowly with the advancement of reproductive period, while the biomass of leaves first increased and then decreased. But the panicle biomass increased continuously. The order of biomass distribution pattern of milk- ripe stage was stems＞ panicles＞ leaves＞ roots. There were allometric relationships between root and stems, panicles, leaves under different nitrogen treatments. The biomass accumulation of stems and panicles was higher than that of root, while the biomass accumulation of leaves was lower than that of root. The morphological plasticity of different organs of‘Qingyin No.1’under nonfertilization was higher than that under fertilization.