| 吴浩,张燕,贾志锋,何克燕,王佳豪,魏小星.青海东部农区引进燕麦品种各器官C、N、P生态化学计量学特征变化研究[J].干旱地区农业研究,2023,(1):160~168 |
| 青海东部农区引进燕麦品种各器官C、N、P生态化学计量学特征变化研究 |
| C, N and P stoichiometry characteristics of oat cultivars in eastern agricultural area of Qinghai Province |
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| DOI：10.7606/j.issn.1000-7601.2023.01.19 |
| 中文关键词: 燕麦 C，N，P含量 生态化学计量学 生育时期 分配规律 |
| 英文关键词:oats C, N and P contents stoichiometry growth stage distribution rule |
| 基金项目:青海省科技基础研究平台（2021-ZJ-T01）；现代农业产业技术体系建设专项资金（CARS-07-G14）；青海省高端创新人才计划（2020-PYBJ-84） |
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| 中文摘要: |
| 以4个引种燕麦（Avena sativa）为典型代表，对其不同生育时期根、茎、叶中的C、N、P含量及其化学计量学特征进行测定，探讨不同生育时期燕麦C、N、P元素含量及其化学计量比的变化规律，为燕麦饲草的科学收获提供理论依据。结果表明：燕麦全株C、N、P含量分别为322.30~333.97、17.42~75.62、2.74~5.42 mg·g-1，燕麦根C、N、P含量分别为298.42~317.92、11.47~73.71、2.82~3.42 mg·g-1，燕麦茎C、N、P含量分别为311.25~338.86、10.15~75.16、2.44~5.06 mg·g-1,燕麦叶C、N、P含量分别为330.80~372.47、30.64~113.80、2.59~8.65 mg·g-1；各器官间C、N、P含量表现为叶＞茎＞根。此外，燕麦各器官C、N、P 含量的积累过程具有一定季节特征，C含量积累过程受生育时期影响较小，表现出较强的稳定性；而N和P含量的积累过程受生育时期影响较大，其在拔节期~抽穗期均高于开花期~乳熟期。燕麦各器官C∶N、C∶P和N∶P分别为4.42～24.44、70.72～124.56和6.56～17.28，其中C∶N、C∶P在开花期~乳熟期均高于拔节期~抽穗期；N∶P则规律相反。 |
| 英文摘要: |
| Four introduced oats (Avena sativa) were used as representatives in this study to determine the C, N, and P contents and their stoichiometric characteristics in roots, stems, and leaves as well as the changes in C, N, and P elemental contents of oats and their stoichiometric ratios at different fertility periods. The study would provide some theoretical basis for scientific harvesting of oat forage. The results showed that the C, N and P contents of whole oat plant were 322.30~333.97, 17.42~75.62 and 2.74~5.42 mg·g-1, respectively. The contents of C, N and P in oat root were 298.42~317.92, 11.47~73.71 and 2.82~3.42 mg·g-1, respectively. The contents of C, N and P in oat stem were 311.25~338.86, 10.15~75.16 and 2.44~5.06 mg·g-1, respectively. The contents of C, N and P in oat leaves were 330.80~372.47, 30.64~113.80 and 2.59~8.65 mg·g-1, respectively. The contents of C, N and P in each organ were leaf > stem > root. In addition, the accumulation process of C, N and P content in oat organs had certain seasonal characteristics. The accumulation process of C content was less affected by growth period and showed strong stability, while the accumulation process of N and P content was more affected by growth period, and it was higher in jointing stage to heading stage than in flowering stage to milk ripe stage. The C∶N, C∶P and N∶P of oat organs were 4.42~24.44, 70.72~124.56 and 6.56~17.28, respectively. The C∶N and C∶P of oat organs from flowering to milking stage were higher than those from jointing stage to heading stage. N∶P was the opposite. |
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