| Effects of biodegradable film mulching and combined application of organic and inorganic nitrogen fertilizer on dry matter accumulation and grain yield of oil flax |
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| DOI：10.7606/j.issn.1000-7601.2021.01.15 |
| Key Words: biodegradable plastic mulch combined application of organic and inorganic nitrogen fertilizer oil flax dry matter filling rate grain yield |
| Author Name | Affiliation | | WANG Yueping | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | GUO Lizhuo | Gansu Provincial Key Lab of Arid Land Crop Science, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | GAO Yuhong | Gansu Provincial Key Lab of Arid Land Crop Science, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LI Jianglong | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China
CNOOC Fudao (Shanghai) Chemical Co., Ltd. North China Branch, Shijiazhuang, Hebei 050000, China | | LIU Hongsheng | Huining Agricultural Husbandry Bureau, Huining, Gansu 730799, China | | XIA Zhangxiang | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| Field experiment was used to study the effect of uncovered, ordinary plastic film, and biodegradable film with thickness of 0.008, 0.010 mm, and 0.012 mm and no nitrogen (N) fertilizer, chemical N fertilizer (120 kg·hm-2), combined application of organic and inorganic N fertilizer (120 kg·hm-2, 2/3 chemical N fertilizer, 1/3 organic N fertilizer) on dry matter accumulation, filling rate, and grain yield of oil flax. The results showed that there was little difference between the effect of biodegradable and ordinary film mulching on growth period (≤2 days), and the effect of 0.012 mm degradable film on growth and development process was the closest to that of the ordinary one. The promotion influence on dry matter accumulation of ordinary film increased by 12.88%~160.22% than that of degradable film mulching treatments. The promotion effect of 0.012 mm degradable film was much closer to that of the ordinary one. Compared with common plastic mulch, dry matter accumulation of 0.012 mm film decreased by 11.41%~27.92% while the other two degradable film reduced by 16.55%~61.57%. There was no significant difference in grain filling rate between 0.012 mm degradable film and the ordinary one. The promotion effect of combined application on dry matter accumulation was more significant than that of inorganic fertilizer alone, which increased by 11.69%~16.44% in mid\|late stage of vegetative growth, but the improving influence of the combined on grain filling rate was smaller than that of the single. The three degradable films had the same increasing effect on the yield as that of the ordinary one, with an average increase of 19.18% under the four film mulching treatments. Nitrogen application improved grain yield prominently, but there were no significant differences between the effects of combined and single application. Film mulching and fertilization only had significant interaction on dry matter accumulation. 0.012 mm degradable film could be used instead of the ordinary one in the test area of oil flax planting. |
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