| 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 |
| Key Words: oats C, N and P contents stoichiometry growth stage distribution rule |
| Author Name | Affiliation | | WU Hao | Qinghai Science and Technology Development Service Center, Xining, Qinghai 810000, China
The Academy of Animal and Veterinary Science, Qinghai University,Qinghai Key Laboratory of Excellent Forage Germplasm Resources Utilization on Qinghai\|Tibet Plateau, Xining, Qinghai 810016, China | | ZHANG Yan | The Academy of Animal and Veterinary Science, Qinghai University,Qinghai Key Laboratory of Excellent Forage Germplasm Resources Utilization on Qinghai\|Tibet Plateau, Xining, Qinghai 810016, China | | JIA Zhifeng | The Academy of Animal and Veterinary Science, Qinghai University,Qinghai Key Laboratory of Excellent Forage Germplasm Resources Utilization on Qinghai\|Tibet Plateau, Xining, Qinghai 810016, China | | HE Keyan | The Academy of Animal and Veterinary Science, Qinghai University,Qinghai Key Laboratory of Excellent Forage Germplasm Resources Utilization on Qinghai\|Tibet Plateau, Xining, Qinghai 810016, China | | WANG Jiahao | The Academy of Animal and Veterinary Science, Qinghai University,Qinghai Key Laboratory of Excellent Forage Germplasm Resources Utilization on Qinghai\|Tibet Plateau, Xining, Qinghai 810016, China | | WEI Xiaoxing | The Academy of Animal and Veterinary Science, Qinghai University,Qinghai Key Laboratory of Excellent Forage Germplasm Resources Utilization on Qinghai\|Tibet Plateau, Xining, Qinghai 810016, China |
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| Abstract: |
| 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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