| 种植密度对甘肃不同生态区小麦产量形成的影响 |
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| 引用本文： | 柴芳梅,高甜甜,柴守玺,程宏波,宋亚丽,鲁清林.种植密度对甘肃不同生态区小麦产量形成的影响[J].作物杂志,2020,36(3):154-6. |
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| 作者姓名： | 柴芳梅 高甜甜 柴守玺 程宏波 宋亚丽 鲁清林 |
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| 作者单位： | 1甘肃省干旱生境作物学重点实验室/甘肃农业大学农学院,730070,甘肃兰州2甘肃农业大学生命科学与技术学院,730070,甘肃兰州3庆阳市农业科学研究院,745000,甘肃庆阳4甘肃省农业科学院小麦研究所,730070,甘肃兰州 |
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| 基金项目： | 国家重点研发计划项目(2018YFD0200401);国家小麦产业技术体系(CARS-3-2-49);国家自然科学基金(31760362) |
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| 摘 要： | 为揭示不同播种量处理对甘肃省3个不同生态区小麦产量形成的影响,分别以陇中2号、兰天36号和铜麦6号为材料,设置5个播种量水平,低温半干旱区和半湿润易旱区为150.0、187.5、225.0、262.5和300.0kg/hm2,半干旱区为112.5、150.0、187.5、225.0和262.5kg/hm2。研究了小麦产量及产量构成要素、群体结构的变化特性和不同区域产量差异。结果表明,低温半干旱区、半湿润易旱区和半干旱区适宜播种量依次为187.5、225.0和225.0kg/hm2,最高产量分别是5 472.0、5 730.0和7 271.4kg/hm2。随种植密度的升高,各生态区小麦产量、穗数均呈先升后降变化趋势,穗粒数随之减小,千粒重无明显变化;基本苗和分蘖成穗率随密度的变化趋势与产量变化一致;地上部生物量随密度增大呈增加趋势,半湿润易旱区和半干旱区不同播种量间地上部生物量差异显著;在相同的播种量下（150.0和225.0kg/hm2）,不同区域的产量差异较大,以半干旱区平均产量最高,半湿润易旱区次之,低温半干旱区最低。
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| 关 键 词： | 甘肃 生态区 种植密度 小麦 产量 |
| 收稿时间： | 2019-10-21 |
Effects of Planting Density on Wheat Yield Formation in Different Ecological Regions of Gansu Province |
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| Chai Fangmei,Gao Tiantian,Chai Shouxi,Cheng Hongbo,Song Yali,Lu Qinglin.Effects of Planting Density on Wheat Yield Formation in Different Ecological Regions of Gansu Province[J].Crops,2020,36(3):154-6. |
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| Authors: | Chai Fangmei Gao Tiantian Chai Shouxi Cheng Hongbo Song Yali Lu Qinglin |
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| Institution: | 1Gansu Provincial Key Laboratory of Aridland Crop Science/Agronomy College, Gansu Agricultural University, Lanzhou 730070, Gansu, China2College of Life Science and Technology, Gansu Agricultural University, Lanzhou 730070, Gansu, China3Qingyang Academy of Agricultural Sciences, Qingyang 745000, Gansu, China4Wheat Research Institute, Gansu Academy of Agricultural Sciences, Lanzhou 730070, Gansu, China |
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| Abstract: | In order to reveal the effect of different rate of sowing quantity treatment on wheat yield formation in three different ecological regions of Gansu Province, three varieties of Longzhong No.2, Lantian No.36 and Tongmai No.6 were used as materials in each region and five sowing quantity levels (150.0, 187.5, 225.0, 262.5, 300.0kg/ha in low-temperature semi-arid region and semi-humid region, and 112.5, 150.0, 187.5, 225.0, 262.5kg/ha in semi-arid region) were set up. The variation characteristics of wheat yield and yield compositions, planting density and yield difference in different regions were studied. The results showed that the suitable sowing quantity in low-temperature semi-arid region, semi-humid arid and semi-arid region were 187.5, 225.0, 225.0kg/ha, corresponding to the highest yield of 5 472.0, 5 730.0 and 7 271.4kg/ha respectively. With the increase of planting density, the yield of wheat and the number of spikes per unit area in each ecological region showed the trend of first increasing and then decreasing, the grain number per spike decreased, 1000-grain weight had no obvious change; change trend of basic seedling and tiller heading rate were similar to that of yield; aboveground biomass increased with the increasing of planting density, and there was significant difference among different planting densities in semi-humid arid region and semi-arid region. Under the same sowing quantity (150.0 and 225.0kg/ha), the yield of different regions varied greatly, with the highest average yield in the semi-arid region, followed by the semi-humid arid region, and the lowest in the low-temperature semi-arid region. |
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| Keywords: | Gansu Ecological region Planting density Wheat Yield |
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