种植密度与每丛苗数对单季杂交稻甬优1540茎蘖动态及产量的影响  

Influence of Planting Density and Seedling Number per Hill on Tillering Dynamics and Yield of Single-season Hybrid Rice Yongyou 1540

作　　者：王志刚[1] 王亚梁 向镜[1] 张义凯[1] 张玉屏[1] 陈惠哲[1] WANG Zhigang;WANG Yaliang;XIANG Jing;ZHANG Yikai;ZHANG Yuping;CHEN Huizhe(China National Rice Research Institute,Hangzhou,Zhejiang 310006,China)

机构地区：[1]中国水稻研究所,浙江杭州310006

出　　处：《杂交水稻》2023年第5期121-125,共5页Hybrid Rice

基　　金：杂交稻机械化精准插秧技术创新及集成应用(Y2022CG 07);水稻精准播种机插栽培技术创新与应用(CPSIBRF-CNRRI-202117);浙江省2022年度领雁攻关计划项目(2022C02034);浙江省农业重大技术协同推广计划项目(2021XTTGLY01);浙江省重点研发项目(2019C02017,2022C02034);浙江省三农六方项目(2021SNLF001)。

摘　　要：以甬优1540为材料,设置不同种植密度和每丛苗数处理,研究两者对水稻茎蘖动态和产量的影响。结果表明,在本试验条件下,随着种植密度的增大,同一时期单位面积茎蘖数显著或极显著增多;随着每丛苗数的增加,单位面积茎蘖数极显著增多,且高峰苗期提前。种植密度对有效穗数影响达显著水平,对每穗总粒数、结实率和产量的影响达极显著水平,对千粒重的影响不显著;每丛苗数对单位面积有效穗数和每穗总粒数的影响达极显著水平,对产量的影响达显著水平,对结实率和千粒重的影响不显著;密度和每丛苗数互作处理对每穗总粒数和产量的影响达极显著水平,对其他产量构成因素的影响不显著。产量以低密度(15.90万穴/hm^(2))、每丛3苗的处理最高,超过11000 kg/hm^(2)。生产上,建议作单季稻种植,甬优1540以密度15.90万穴/hm^(2)、每丛3苗种植为宜。Using Yongyou 1540 as the material,the effects of different planting densities and number of seedlings per hill on tillering dynamics and yield of rice were studied.The results showed that with the increase of planting density,the number of tillers per unit area increased significantly or very significantly in the same period;with the increase of seedling number per hill,the number of tillers per unit area increased very significantly,and the peak tillering period was advanced.The effect of planting density on the effective panicle number per unit area was significant,the effect on the total spikelet number per panicle,seed setting rate and yield was very significant,but the effect on 1000-grain weight was not significant.The number of seedlings per hill had a very significant effect on the effective panicle number per unit area and the total spikelet number per panicle,and had a significant effect on the yield,but had no significant effect on the seed setting rate and 1000-grain weight.The interaction between planting density and seedling number per hill had a very significant effect on the total spikelet number per panicle and yield,but had no significant effect on other yield components.The highest yield was more than 11000 kg/hm^(2) under the treatment of low density(159000 hill/hm^(2))and three seedlings per hill.It is recommended that the single-season rice Yongyou 1540 should be planted with a density of 159000 hill/hm^(2) and three seedlings per hill.

关 键 词：杂交水稻 甬优1540 种植密度 每丛苗数 茎蘖动态 产量 

分 类 号：S511.04[农业科学—作物学] S318