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首页> 美国卫生研究院文献>Journal of Nematology >Planting Date and Soybean Cultivar Maturity Group Affect Population Dynamics of Heterodera glycines and All Affect Yield of Soybean
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Planting Date and Soybean Cultivar Maturity Group Affect Population Dynamics of Heterodera glycines and All Affect Yield of Soybean

机译：种植日期和大豆品种成熟度组对杂种优势甘氨酸种群动态的影响及对大豆产量的影响

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摘要

Five soybean cultivars, one each from Maturity Groups (MG) III, IV, V, VI, and VII, all susceptible to Heterodera glycines, were planted in H. glycines-infested soil in April, May, June, and July at multiple locations in Arkansas and Missouri. The purpose of the study was to determine whether planting early reduces yield losses due to H. glycines. The population levels of cysts, eggs, and secondstage juveniles of H. glycines were determined from soil samples collected at planting and harvest. Yields were measured from the two middle rows of 4.9 or 6.1-m four-row plots. The population dynamics of the nematode varied with planting date, cultivar, MG, and initial nematode population. Generally, the lowest reproductive factor (Rf = final population/initial population) for any year was on the MG III cultivar, regardless of planting date or field location. Also, the Rf was generally lower on each cultivar planted in April than in June or July. The highest Rf values were on cultivars in MG VI or VII planted in June or July. Yields were not consistently correlated with initial nematode population level. Early planting of late-maturing soybean cultivars may be profitable, but early planting of MG III cultivars, though supporting little if any increase in nematode numbers, did not result in high yields.
机译：在5月，5月，6月和7月在多个地点种植了H.甘氨酸的土壤中种植了5个大豆品种，分别来自成熟度组（MG）III，IV，V，VI和VII，它们均对Heterodera甘氨酸敏感。在阿肯色州和密苏里州。该研究的目的是确定早期种植是否能减少因甘氨酸丝氨酸引起的产量损失。从种植和收获时收集的土壤样品中确定甘氨酸链球菌的囊肿，卵和二级幼虫的种群水平。从4.9或6.1米四行图的中间两行测量产量。线虫的种群动态随播种日期，品种，MG和初始线虫种群而变化。通常，无论种植日期或田地位置如何，MG III品种在任何一年中的繁殖因子最低（Rf =最终种群/初始种群）。另外，4月种植的每个品种的Rf通常比6月或7月低。 Rf值最高的是六月或七月种植的MG VI或VII的品种。产量与最初的线虫种群水平并不一致。早播晚熟大豆品种可能有利可图，但MG III早品种的种植虽然支持线虫数量的增加（即使有的话很少），但并未带来高产。

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