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Increasing yield, quality and profitability of winter oilseed rape (Brassica napus) under combinations of nutrient levels in fertiliser and planting density

文献类型： 外文期刊

作者： Tian, Chang 1 ; Zhou, Xuan 3 ; Liu, Qiang 1 ; Peng, Jianwei 1 ; Zhang, Zhenhua 1 ; Song, Haixing 1 ; Ding, Zheli 4 ; Zhra 1 ;

作者机构： 1.Hunan Agr Univ, Hunan Prov Key Lab Farmland Pollut Control & Agr, Hunan Prov Key Lab Plant Nutr Common Univ, Changsha 410128, Hunan, Peoples R China

2.Hunan Agr Univ, Coll Resources & Environm, Natl Engn Lab, Changsha 410128, Hunan, Peoples R China

3.Hunan Acad Agr Sci, Soil & Fertilizer Inst, Changsha 410125, Hunan, Peoples R China

4.Chinese Acad Trop Agr Sci, Haikou Expt Stn, Haikou 571101, Hainan, Peoples R China

5.Atom Energy Author, Nucl Res Ctr, Soil & Water Res Dept, Abou Zaabl 13759, Egypt

6.Chinese Acad Sci, Inst Subtrop Agr, Changsha 410125, Hainan, Peoples R China

7.Assiut Univ, Fac Agr, Dept Soils, Assiut 71526, Egypt

8.Assiut Univ, Fac Agr, Dept Water, Assiut 71526, Egypt

9.Soils Water & Environm Res Inst, Agr Res Ctr, Giza 12112, Egypt

10.Assiut Univ, Fac Agr, Agron Dept, Assiut 71526, Egypt

关键词： Brassica napus; economic profits; fertilising levels; oilseed rape; planting densities; transplanting; yield quality

期刊名称：CROP & PASTURE SCIENCE （ 影响因子：2.286； 五年影响因子：2.507 ）

ISSN： 1836-0947

年卷期： 2020 年 71 卷 11-12 期

页码：

收录情况： SCI

摘要： Oilseed rape (Brassica napus L.) is a crucial source of edible oil and livestock feeding, and is a promising biofuel crop. The increasing demand for oilseed rape requires strategies to increase yield while retaining quality. Field experiments were performed in southern China to evaluate the impacts of fertiliser level and planting density on dry matter accumulation, seed oil and protein content (%) and yield (per ha), oil quality, and the profitability of oilseed rape. Fertiliser treatments contained nitrogen (N), phosphorus (P), potassium (K), sulfur (S) and boron (B) at four increasing rates, compared with nil fertiliser, and there were six planting densities (range 7.5-45 x 10(4) plants ha(-1)). Dry matter accumulation significantly (P < 0.05) increased in response to increasing plant population and fertiliser level, whereas harvest index decreased, suggesting that increasing the production of oilseed rape is limited to improvement of population quality. Seed oil and protein contents were significantly affected by fertiliser level rather than planting density. Increasing the fertiliser rate increased seed protein content, simultaneously slightly decreasing oil content. Glucosinolate content of rapeseed slightly decreased with increasing fertiliser but erucic and oleic acid contents were not affected, indicating that increasing the fertiliser rate might not reduce oilseed rape quality. Manipulation of fertiliser level was more effective than altering planting density for increasing seed oil and protein yields. Highest seed oil and protein yields resulted from the highest fertiliser application of 240 kg N, 52.4 kg P, 174.3 kg K, 15 kg S and 1.2 kg B ha(-1), under a planting density of 22.5 x 10(4) plants ha(-1). Maximum economic gain occurred with the two highest fertiliser levels, whereas planting density has no significant effect on profitability. A balanced application of NPKSB fertilisers should be employed with direct-sowing cultivation of oilseed rape, aimed at building a suitable population structure that balances plant population density and individual growth.

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