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[1]WU Bing,GAO Yuhong,GAO Zhenni,et al.Effects of Fertilization on Water Consumption Characteristic and Grain Yield of Linum usitatissimum L. in Dry Land[J].Research of Soil and Water Conservation,2017,24(03):188-193.

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Effects of Fertilization on Water Consumption Characteristic and Grain Yield of Linum usitatissimum L. in Dry Land

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 03 Page number: 188-193 Column: Public date: 2017-06-28

Title:: Effects of Fertilization on Water Consumption Characteristic and Grain Yield of Linum usitatissimum L. in Dry Land

Author(s):: WU Bing^1,2, GAO Yuhong^2,3, GAO Zhenni^2,4, YAN Bin^2,3, ZHANG Zhongkai^2,3, CUI Zhengjun^2,3, NIU Junyi^2,3; 1. College of Life Sciences and Technology, Gansu Agricultural University, Lanzhou 730070, China;
2. Gansu Provincial Key Laboratory of Arid land Crop Science, Lanzhou 730070, China;
3. College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China;
4. College of Information Sciences and Technology, Gansu Agricultural University, Lanzhou 730070, China

Keywords:: Linum usitatissimum L.; fertilization; water consumption characteristic; grain yield

CLC:: S563.2

DOI:: -

Abstract:: In order to regulate the combined application levels of N and P reasonably in the process of Linum usitatissimum L. production, field experiment in dry land was conducted to elucidate the effects of fertilization on water consumption characteristic, grain yield and water use efficiency of Linum usitatissimum L. which was ‘Longyaza 1’, thereby providing theoretical reference for fertilizer application of rain-fed Linum usitatissimum L. in hilly area of the Loess Plateau. Four fertilizer application treatments were 2 nitrogen levels: N₁(75 kg/hm²) and N₂ (150 kg/hm²), and 2 phosphorus levels: P₁ (75 kg/hm²) and P₂ (150 kg/hm²), which were marked for N₁P₁, N₁P₂, N₂P₁, N₂P₂, and the control (N₀ P₀) was without nitrogen and phosphorous fertilizer. The results indicated that total water consumption rose with increase of the application amounts of N and P in 2013, reached the peak as the fertilization increased to the level of N₂P₁ in 2014 and markedly enhanced by 10.23% than N₂ P₂ which was the maximum rate of fertilizer. Compared with the N₀P₀, the water consumption at depth of 100—200 cm of soil obviously increased by 13.03~19.36 mm. Besides, water consumption at the budding to full-flowering periods had a sharp increase with the amount of fertilization in 2013, whereas the N₂P₁ was the most in 2014 and significantly enhanced by 19.25% and 17.87% than the N₀P₀ and N₂P₂, respectively. These results indicated that combined application of N and P could improve the absorption of soil moisture, especially for deep soil water, to meet the water requirement of Linum usitatissimum L. in later growth period. In addition, the grain yield of Linum usitatissimum L. decreased in the order: N₂P₁ > N₂P₂ > N₁P₂ > N₁P₁ > N₀P₀, and yield of N₂P₁ was 44.27%~56.55% higher compared the N₀ P₀. The changes of water use efficiency was fairly consistent with grain yield, and the N₂ P₁ was the largest, followed by the N₂ P₂ under different fertilizations, which were raised by 30.23%~38.54% and 20.50%~36.81%, respectively, compared with the treatment of N₀P₀. As far as saving-fertilizer and high-yield were concerned in the experiment, the most appropriate fertilizer treatment for recommendation was the one which had 150 kg/hm² (N) and 75 kg/hm² (P₂O₅) for rain-fed Linum usitatissimum L. under the climate conditions of the experimental area.

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