Effects of Bromus japonicus on the yield traits of wheat in desert oasis regions

doi:10.6048/j.issn.1001-4330.2025.07.005

Abstract

Abstract:

【Objective】 To investigate the effects of Bromus japonicus density on the physiological indicators and yield traits of wheat in the hope of providng a scientific foundation for identifying control metrics for Bromus japonicus in wheat fields and developing integrated management strategies. 【Methods】 The effects of different densities of B. japonicus (0, 50, 100, 150 plants/m²) on wheat physiological indicators and yield traits were studied and various models were used to fit the functional relationship between different densities of B. japonicusand wheat yield loss rate, and the optimal model was selected. Furthermore, the economic threshold for the control of B. japonicus was analyzed based on the economic injury level. 【Results】 The height of wheat plants, the number of spikes, the number of grains per ear, the weight of 1000 grains, and the overall yield exhibited a significant negative correlation with the density of B. japonicus. At a density of 150 B. japonicus plants per square meter, the wheat yield decreased by 38.24% compared to the control group. The equation y=1.240,4x^0.685,3 might more accurately represent the relationship between the density of B. japonicus and the wheat yield loss rate. A density of 0.76 plants/m² of B. japonicus indicated the economic threshold for UAV management of this species. 【Conclusion】 Consequently, preventive measures should be taken if the sustained density of B. japonicus damage in the field exceeds 0.76 plants/m².

Key words: wheat fields in desert oasis areas; B. japonicus; yield loss rate; economic threshold

摘要：

【目的】探讨荒漠绿洲区不同密度雀麦(Bromus japonicus)对小麦生理指标和产量性状的影响,分析小麦田雀麦防治指标,为制定综合防控措施提供科学依据。【方法】研究不同密度雀麦(0、50、100和150株/m²)对小麦生理指标和产量性状的影响,采用多种模型拟合分析不同密度雀麦与小麦产量损失率之间的函数关系,筛选出最优模型,并根据经济危害允许水平分析雀麦的防治经济阈值。【结果】小麦株高、穗数、穗粒数、千粒重和产量与雀麦密度呈显著负相关。当雀麦密度为150株/m²,与CK相比小麦产量减少了38.24%。y=1.240 4x⁰^.^{685 3}可较好地拟合雀麦密度与小麦产量损失率间的关系,当雀麦密度为0.76株/m²时,达到无人机防除雀麦经济阈值。【结论】雀麦对小麦的抑制效应与其密度呈正相关,当田间雀麦持续危害密度高于0.76株/m²时,应及时防除。

关键词: 荒漠绿洲区麦田, 雀麦, 产量损失率, 经济阈值

CLC Number:

S512

LIN Min, SHEN Yuyang, DENG Feifei, LI Guangkuo, GAO Haifeng. Effects of Bromus japonicus on the yield traits of wheat in desert oasis regions[J]. Xinjiang Agricultural Sciences, 2025, 62(7): 1605-1611.

林敏, 沈煜洋, 邓菲菲, 李广阔, 高海峰. 荒漠绿洲区小麦田雀麦对小麦产量性状的影响[J]. 新疆农业科学, 2025, 62(7): 1605-1611.

Figures/Tables 9

References 23

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指标 Indexes	雀麦密度 B. japonicus Density	有效穗数 Effective panicles per plant	穗粒数 Grains per panicle	千粒重 Thousand- grain weight	产量 Yield
有效穗数Effective panicles per plant	-0.882^**
穗粒数Grains per panicle	-0.968^**	0.889^**
千粒重Thousand-grain weight	-0.885^**	0.674*	0.808^**
产量Yield	-0.945^**	0.776^**	0.867^**	0.963^**
产量损失率Yield loss rate	0.979^**	-0.908^**	-0.939^**	-0.894^**	-0.962^**

指标 Indexes	雀麦密度 B. japonicus Density	有效穗数 Effective panicles per plant	穗粒数 Grains per panicle	千粒重 Thousand- grain weight	产量 Yield
有效穗数Effective panicles per plant	-0.882^**
穗粒数Grains per panicle	-0.968^**	0.889^**
千粒重Thousand-grain weight	-0.885^**	0.674*	0.808^**
产量Yield	-0.945^**	0.776^**	0.867^**	0.963^**
产量损失率Yield loss rate	0.979^**	-0.908^**	-0.939^**	-0.894^**	-0.962^**

回归模型 Regression model	回归方程 Equation of regression	R²	F	Sig.	常数 constant	b1
线性函数 Linear function	y=0.201 2x+8.498 6	0.953 1	203.058 6	5.72E-08	8.498 6	0.201 2
对数函数 Logarithm	y=-52.930 3+18.085 4log(x)	0.950 4	191.424 4	7.58E-08	-52.930 3	18.085 4
幂函数 Power	y=1.240 4x⁰^.^{685 3}	0.942 7	164.481 4	1.56E-07	1.240 4	0.685 3
S函数 Sigmoid	y=exp(3.972 5+-54.543 3/x)	0.931 5	135.892 2	3.83E-07	3.972 5	-54.543 3
指数函数 Exponential	y=12.873 8e⁰^.^{007 5}^x	0.916 1	109.190 5	1.06E-06	12.873 8	0.007 5

回归模型 Regression model	回归方程 Equation of regression	R²	F	Sig.	常数 constant	b1
线性函数 Linear function	y=0.201 2x+8.498 6	0.953 1	203.058 6	5.72E-08	8.498 6	0.201 2
对数函数 Logarithm	y=-52.930 3+18.085 4log(x)	0.950 4	191.424 4	7.58E-08	-52.930 3	18.085 4
幂函数 Power	y=1.240 4x⁰^.^{685 3}	0.942 7	164.481 4	1.56E-07	1.240 4	0.685 3
S函数 Sigmoid	y=exp(3.972 5+-54.543 3/x)	0.931 5	135.892 2	3.83E-07	3.972 5	-54.543 3
指数函数 Exponential	y=12.873 8e⁰^.^{007 5}^x	0.916 1	109.190 5	1.06E-06	12.873 8	0.007 5

防除措施 Control method	防除费用 Control cost (元/hm²)	防除效果 Control effect (%)	经济危害允许水平 Economic infestation level(%)	经济阈值 Economic threshold (株/m²)
人工除草Hand weeding	2 000	100.00	11.11	24.51
植保无人机喷施 Spraying by plant protection drone	170	91.70	1.03	0.76
背负式喷雾器喷施 Spraying by knapsack sprayer	380	91.70	2.30	2.46