增密扩行对宽幅匀播胡麻抗倒伏能力及籽粒产量的影响OA
Effects of Increasing Density and Row Spacing on Lodging Resistance and Grain Yield of Oil Flax under Wide-Width Uniformed Sowing Status
为进一步提高旱作农业区胡麻(Linum usitatissimum L.)抗倒伏能力和籽粒产量,本研究以胡麻品种定亚26为试验材料,于2021年通过田间裂区试验,研究了宽幅(10 cm)播种技术下增密(750、850和950粒·m-2)扩行(15、20和25 cm行距)对胡麻抗倒伏性和产量的影响.结果表明,随着胡麻种植密度的增加,植株株高和重心高度均增大,850和950粒·m2分别较常规播种密度(750粒·m2)平均增加8.96%和9.13%,茎粗、单株鲜重、茎秆强度、抗折力和抗倒伏指数分别降低9.58%、18.08%、11.11%、34.30%和22.46%,差异达显著水平.在950粒·m-2密度水平下,与常规条播相比,宽幅匀播有利于缓解胡麻株高的快速增长,增大茎粗,增强茎秆抗倒伏能力,其中10 cm幅宽处理下15和20 cm行距青果期茎秆强度、抗折力、抗倒伏指数分别提高1.71%和10.67%、6.58%和19.30%、13.62%和20.71%,且差异达显著水平;籽粒产量显著高出 19.85%～30.46%,其中,20 cm行距处理下籽粒产量最高,达1 884.44 kg·hm-2.综上,10 cm幅宽和20 cm行距配合950粒·m-2种植密度有利于提高陇中旱作农业区胡麻的抗倒伏能力和籽粒产量.本研究结果为旱作农业区胡麻抗逆高产栽培模式提供了技术参考.
This study used an oil flax variety of Dingya 26 as the test material to explore the improvement of its lodging resistance and grain yield in dry farming areas.Thus,a split plot field experiment was carried out to study the effects of increasing density(750,850 and 950 grains·m-2)and expanding row spacing(15,20 and 25 cm row spacing)on the lodging resistance and yield of oil flax in 2021.Compared to the conventional drilling sowing density,the plant height and center of gravity height increased by 8.96%and 9.13%with the increase of oil flax planting density,respectively.The stem diameter,fresh weight per plant,stem strength,breaking resistance and lodging resistance index significantly decreased by 9.58%,18.08%,11.11%,34.30%and 22.46%,respectively.At the density level of 950 grains·m-2,compared to the conventional drilling sowing,the wide-width uniform sowing was beneficial to alleviate the rapid growth of oil flax plant height,increase stem diameter,and enhance stem lodging resistance.In addition,the stem strength,breaking resistance,and lodging resistance index of 15 and 20 cm row spacing 10 cm increased significantly by 1.71%and 10.67%,6.58%and 19.30%,13.62%and 20.71%,respectively.The grain yield increased by 19.85%-30.46%,where the grain yield under 20 cm row spacing treatment was the highest(1 884.44 kg·hm-2).In summary,10 cm width and 20 cm row spacing combined with 950 grain·m-2 planting density was beneficial to improve the lodging resistance and grain yield of oil flax in the dry farming area of central Gansu.This study provides a technical reference for the stress-resistant and high-yield cultivation model of oil flax in dry farming areas.
薛文芳;高玉红;胡亚朋;崔政军;王一帆;剡斌;晁长艳
甘肃农业大学农学院,甘肃 兰州 730070甘肃农业大学农学院,甘肃 兰州 730070||甘肃省干旱生境作物学国家重点实验室,甘肃 兰州 730070甘肃省干旱生境作物学国家重点实验室,甘肃 兰州 730070
胡麻宽幅匀播密度抗倒伏产量
oil flaxwide-width uniform sowingdensitylodging resistanceyield
《核农学报》 2024 (001)
149-159 / 11
甘肃省教育科技创新产业支撑计划项目(2021CYZC-38),中央引导地方科技发展专项基金(ZCYD-2021-12),国家现代农业产业技术体系(CARS-14-1-16),甘肃农业大学干旱生境作物学重点实验室主任基金课题(GSCS-2020-Z6)
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