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Relationship between Phosphorus and Nitrogen Concentrations of Flax

文献类型： 外文期刊

作者： Xie, Yaping 1 ; Li, Lingling 2 ; Wang, Limin 1 ; Zhang, Jianping 1 ; Dang, Zhao 1 ; Li, Wenjuan 1 ; Qi, Yanni 1 ; Zhao, Wei 1 ; Dong, Kongjun 1 ; Wang, Xingrong 1 ; Zhang, Yanjun 1 ; Zeng, Xiucun 4 ; Zhou, Yangchen 2 ; Wang, Xingzhen 1 ; Shi, Linrong 5 ; Wu, Gang 6 ;

作者机构： 1.Gansu Acad Agr Sci GASS, Crop Res Inst, Lanzhou 730070, Peoples R China

2.Gansu Agr Univ GSAU, Coll Agron, Lanzhou 730070, Peoples R China

3.Gansu Agr Univ GSAU, State Key Lab Aridland Crop Sci, Lanzhou 730070, Peoples R China

4.Hexi Univ, Key Lab Hexi Corridor Resources Utilizat Gansu, Zhangye 734000, Peoples R China

5.Gansu Agr Univ GSAU, Coll Mech & Elect Engn, Lanzhou 730070, Peoples R China

6.Gansu Acad Agr Sci GAAS, Zhangye Water Saving Agr Expt Stn, Zhangye 734000, Peoples R China

关键词： nitrogen; phosphorus; shoot biomass; N; P ratio

期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）

ISSN：

年卷期： 2023 年 13 卷 3 期

页码：

收录情况： SCI

摘要： Tools quantifying phosphorus (P) status in plants help to achieve efficient management and to optimize crop yield. The objectives of this study were to establish the relationship between P and nitrogen (N) concentrations of flax (Linum usitatissimum L.) during the growth season to determine the critical P concentration for diagnosing P deficiency. Field experiments were arranged as split plots based on a randomized complete block design. Phosphorus levels (0, 40, 80, 120, and 160 kgP(2)O(5) ha(-1)) were assigned to the main plots, and cultivars (Dingya 22, Lunxuan 2, Longyaza 1, Zhangya 2, and Longya 14) were allocated to the subplots. Shoot biomass (SB) and P and N concentrations were determined at 47, 65, 74, 98, and 115 days after emergence. Shoot biomass increased, while P and N concentrations and the N:P ratio declined with time in each year. The P concentration in respect of N concentration was described using a liner relationship (P = 0.05, N + 1.68, R-2 = 0.76, p < 0.01) under non-limiting P conditions, in which the concentrations are expressed in g kg(-1) dry matter (DM). The N:P ratio was fitted to a second-order polynomial equation (N:P = 11.56 x SB-0.1, R-2 = 0.71, p = 0.03), based on the SB of flax. This research first developed a predictive model for critical P concentration in flax, as a function of N concentration in shoots of flax. The critical P concentration can be used as a promising alternative tool to quantify the degree of P deficiency of flax during the current growing season.

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