| Effect of potassium and density on dry matter and potassium accum ulation translocation and seed yield of oilseed flax |
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| DOI：10.7606/j.issn.1000-7601.2017.06.29 |
| Key Words: potassium fertilizer density oilseed flax dry matter potassium accumulation potassium translocation seed yield |
| Author Name | Affiliation | | XIE Ya-ping | Crop Research Institute， Gansu Academy of Agricultural Sciences, Lanzhou 730070, China | | NIU Xiao-xia | Gansu Academy of Agriculture and Engineering Technology， Wuwei 733006, China | | NIU Jun-yi | College of Agronomy, Gansu Agricultural University, Lanzhou 730070， China | | YANG Tian-qing | College of Agronomy, Gansu Agricultural University, Lanzhou 730070， China | | LV Zhong-cheng | Ordos Institute of Agricultural Sciences， Dongsheng Iinner Mongolia 017000, China | | ZHANG Jian-ping | Crop Research Institute， Gansu Academy of Agricultural Sciences, Lanzhou 730070, China | | ZHAO Wei | Crop Research Institute， Gansu Academy of Agricultural Sciences, Lanzhou 730070, China | | YAN Bin | College of Agronomy, Gansu Agricultural University, Lanzhou 730070， China |
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| Abstract: |
| In the present study, the cultivar “Longyaza 1” was used as materiala, with three potassium fertilization treatments (K2O): 0, 45 kg·hm-2 and 90 kg·hm-2 and three plant density treatments: 4.5×106, 7.5×106 and 10.5×106 plant·hm-2 to investigate the effect of potassium and density on dry matter and potassium accumulation, translocation, seed yield and potassium in seed of oilseed flax(Linum usitatissimum L.). The result showed that dry matter and potassium accumulation increased, translocation amount increased, translocation rate decreased, dry matter and potassium translocation from leaf and pericarps and stem to seed contribution decreased, dry matter accumulation of seed yield after anthesis and potassium accumulation in seed after anthesis increased with increasing potassium and density. Under potassium rate (K2O) of 45 kg·hm-2 and density of 7.5×106 plant·hm-2 treatment, the translocation amount of dry matter and potassium from stem, leaf and pericarps of oilseed flax was as high as 1 183.56 kg·hm-2 and 30.28 kg·hm-2, respectively, compared with zero potassium and 4.5×106 plant·hm-2 treatment, and the lowest contribution to seed with 40.28% and 58.72%, respectively. Moreover, the highest seed yield and potassium in seed of oilseed flax were 2 938.33 kg·hm-2 and 51.57 kg·hm-2, respectively, increased by 44.32% and 49.43% compared to zero potassium and 4.5×106 plant·hm-2 treatment. In summary, the optimum fertilization was 45 kg·hm-2 (K2O) and 7.5×106 plant·hm-2 for oilseed flax cultivation in the target area. |
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