| Effects of water and fertilizer coupling on nitrogen content, grain yield and quality of intercropped oil flax |
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| DOI：10.7606/j.issn.1000-7601.2016.02.11 |
| Key Words: water/fertilizer coupling intercropped flax and soybean nitrogen content grain yield quality |
| Author Name | Affiliation | | GAO Yu-hong | Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WU Bing | College of Life Sciences and Technology, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | NIU Jun-yi | Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | YANG Shu-jun | The People's Government of East-lake Town Minqin County, Minqin, Gansu, 733307, China | | GUO Li-zhuo | Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHANG Xiao-jun | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | QIAO Yong-fang | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| To elucidate the current production status of flax and the comprehensive effect of the intercropping system, and water and fertilizer on crop growth and yield formation, a field experiment was implemented to study the effects of water and fertilizer coupling on nitrogen content, and grain yield of flax in flax/soybean system in northwest China. The results indicated that the stem nitrogen content under 150 kg·hm-2 fertilizer treatment was 10.05%～23.58% higher than that under 75 kg·hm-2 and 225 kg·hm-2 treatments. The treatment with 150 kg·hm-2 fertilizer and irrigation two or three times could promote nitrogen content in root and stem at seeding, budding, kernel and maturity stages, resulting in 4.13% more nitrogen content than that with 75 kg·hm-2 fertilizer and irrigation once. The influences of water, nitrogen fertilizer and water/fertilizer coupling on nitrogen content in roots, stem, leaf and grain were in the following order: water and fertilizer coupling＞nitrogen fertilizer＞water. Nitrogen contents in root, stem and peel were significantly positively correlated with seed production under the water/fertilizer coupling condition. The linolenic acid content of oil flax with 150 kg·hm-2 fertilizer and two times irrigations was 9.22% higher than that with 75 kg·hm-2 fertilizer and one time irrigation at a significant level. It is concluded that the treatment of 150 kg·hm-2 fertilizer and two or three times irrigation may be a suitable managerial measures for water and fertilizer in the irrigated area along the yellow river. |
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