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Determination of Critical Phosphorus Dilution Curve Based on Capsule Dry Matter for Flax in Northwest China

文献类型： 外文期刊

作者： Xie, Yaping 1 ; Li, Yang 2 ; Wang, Limin 1 ; Nizamani, Mir Muhammad 3 ; Lv, Zhongcheng 4 ; Dang, Zhao 1 ; Li, Wenjuan 1 ; Qi, Yanni 1 ; Zhao, Wei 1 ; Zhang, Jianping 1 ; Cui, Zhengjun 5 ; Wang, Xingrong 1 ; Zhang, Yanjun 1 ; Wu, Gang 6 ;

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

2.Shanxi Agr Univ SXAU, Coll Agron, Taiyuan 030006, Peoples R China

3.Hainan Univ HNU, Sch Life & Pharmaceut Sci, Haikou 570228, Peoples R China

4.Ordos Inst Agr Sci OIAS, Dongsheng 017000, Peoples R China

5.Gansu Agr Univ GSAU, Coll Agron, 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： phosphorus dilution curve; flax; phosphorus nutrition index; relative seed yield; phosphorus nutrition status

期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）

ISSN：

年卷期： 2022 年 12 卷 11 期

页码：

收录情况： SCI

摘要： One of the cores of flax (Linum usitatissimum L.) production is to precisely measure the requirement of phosphorus (P) fertilization for optimizing seed yield, grower profits, P-use efficiency, and reducing environmental risk. Therefore, critical P concentration (Pc) was proposed as a suitable analytical tool to assess the flax P nutrition status. Four field experiments, with five P applications (0, 40, 80, 120, 160 kg P2O5 ha(-1)) and four cultivars (Longyaza 1, Longya 14, Lunxuan 2, and Dingya 22) were conducted from the 2017 to 2019 seasons. The capsule Pc dilution curve based on capsule dry matter (CDM) was described by Pc = 2.84 x CDM-0.22 (R-2 = 0.87, p < 0.01), CDM ranging from 0.60 to 4.17 t ha(-1). The P nutrition index (PNI) exhibited a significant positive relationship with P application rate. In addition, the relative seed yield was closely related to PNI. Those results validate that the capsule Pc dilution curve can be an alternative and more rapid tool to diagnose flax P status to support P fertilization precise decisions during the reproductive growth of flax in northwest China.

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