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Balanced fertilization under different plant densities for winter oilseed rape (Brassica napus L.) grown on paddy soils in Southern China

文献类型： 外文期刊

作者： Tian, Chang 1 ; Zhou, Xuan 4 ; Fahmy, Ahmed E. 5 ; Ding, Zheli 5 ; Zhran, Mostafa A. 6 ; Liu, Qiang 1 ; Peng, Jianwei; 1 ;

作者机构： 1.Hunan Agr Univ, Hunan Prov Key Lab Farmland Pollut Control & Agr, Coll Resources & Environm, Changsha 410128, Peoples R China

2.Hunan Prov Key Lab Plant Nutr Common Univ, Changsha 410128, Peoples R China

3.Southern Reg Collaborat Innovat Ctr Grain & Oil C, Natl Engn Lab, Coll Resources & Environm, Changsha 410128, Peoples R China

4.Zhejiang Univ, Coll Environm Sci & Resources, Hangzhou 310058, Peoples R China

5.Chinese Acad Trop Agr Sci CATAS, Haikou Expt Stn, Haikou, Hainan, Peoples R China

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

7.Natl Ctr Oilseed Crops Improvement, Hunan Branch, Changsha 410128, Peoples R China

8.Chinese Acad Sci, Inst Subtrop Agr, Changsha, Peoples R China

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

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

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

关键词： Winter oilseed rape; Seed yield; Chlorophyll; Agronomic trait; Fertilizing level; Planting density

期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：5.645； 五年影响因子：5.749 ）

ISSN： 0926-6690

年卷期： 2020 年 151 卷

页码：

收录情况： SCI

摘要： Adequate amount of essential plant nutrients and plant density are vital factors influencing the productivity of oilseed rape (Brassica napus L.). Field experiments were conducted in southern China to study the influence of different fertilizing levels and planting densities on the seed yield, chlorophyll content and some growth traits of winter oilseed rape. Five fertilizing levels and six planting densities were set in a randomized block design. The tested planting densities were D-1, D-2, D-3, D-4, D-5 and D-6 with 7.5 x 10(4), 15 x 10(4), 22.5 x 10(4), 30 x 10(4), 37.5 x 10(4) and 45 x 10(4) plants ha(-1), respectively. The tested fertilizing levels were Fo (control without fertilization), F-1 (N = 60, P2O5 = 30, K2O = 52.5, S = 3.75, B =0.3 kg ha(-1)), F-2 (N = 120, P2O5 = 60, K2O = 105, S = 7.50, B = 0.60 kg ha(-1)), F-3 (N = 180, P2O5 = 90, K2O = 157.5, S = 11.25, B = 0.90 kg ha(-1)) and F-4 (N = 240, P2O5 = 120, K2O = 210, S = 15, B =1.20 kg ha(-1)). The results showed that there were close relationships between the seed yield and fertilizing levels x planting densities. Below the fertilization level of F-2, the seed yield increased as the planting density increased. Application of F-3 caused a seed yield decline when the planting density surpassed 37.5 x 10(4) plants ha(-1). The tested fertilizing levels caused remarkable increases in the seed yield but the plant density had little effects. The highest seed yield (2487 kg ha(-1)) was recorded in F4D3 followed by F4D1 (2308 kg ha-1), F4D5 (2303 kg ha(-1)) and F3D6 (2302 kg ha(-1)); while the minimum yield was obtained from the unfertilized soil treatments. The current research paper highlighted the importance of balanced N, P, K, S and B application under the different plant densities in winter oilseed rape. The individual growth of plants compensated the low plant density, but increasing the fertilization rates caused remarkable increases in the oilseed rape, suggesting that optimum nutrients rates are a critical factor in seed yield production.

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