中美德系玉米品种的耐密性对深松耕作措施的响应分析  

Response Analysis on the Density-tolerant of the Maize Varieties of China,Germany and the United States to Subsoiling Tillage

作　　者：裴宽 于晓芳[1] 高聚林[1] 王志刚[1] 孙继颖[1] 胡树平[1] 李雅剑 刘梅 赵强 

机构地区：[1]内蒙古农业大学农学院,呼和浩特010019 [2]巴彦淖尔市杭锦后旗农牧业技术推广中心,内蒙古巴彦淖尔015400

出　　处：《玉米科学》2017年第4期97-104,共8页Journal of Maize Sciences

基　　金：国家自然科学基金(31560360);国家科技支撑计划(2013BAD07B04);国家玉米产业技术体系(CARS-02-63);华北黄土高原地区作物栽培科学观测实验站项目(25204120)

摘　　要：采取耕作方式×种植密度×品种三因素裂区试验,深松40 cm和旋耕15 cm耕作条件,在9.0万株/hm^2和10.5万株/hm^2种植密度下,对中系郑单958和登海618、美系先玉335和华美1号、德系KX3564和KWS2564不同血缘玉米品种的地上部形态、生理及产量构成指标进行对比分析。结果表明,深松可降低增密后玉米净光合速率、LAI、SPAD值和单株生产能力的下降幅度,缓解株型的变化,提高玉米的耐密性。我国玉米品种的耐密性对深松耕作响应与美系和德系玉米品种存在差异,深松耕作与旋耕相比,华美1号、KX3564、KWS2564、先玉335增加种植密度后,其穗位叶叶倾角、净光合速率、LAI、SPAD值下降缓慢,产量、耐密系数显著提高,其耐密适应性对深松耕作的响应度高于郑单958、登海618。Planting density xtillageXvariety three factors split plot experiment was adopted, under two tillage conditions of subsoiling 40 cm and rotary tillage 15 cm, and two planting densities（90 000 plants/ha and 105 000 plants/ha）. Compared with 6 different blood maize cuhivars, including China Zhengdan958 and Denghai618, the United States of Xianyu335 and Huamei No.l, Germany KX3564 and KWS2564 on shoot morphology, physiology and yield. The results showed that, subsoiling could decrease the fell of the net photosynthetic rate, LAI, SPAD value and yield per plant, relieve plant morphological changing, improve maize density -tolerance. The response of the density-tolerance of China maize varieties to deep tillage was different with American and German maize varieties： Under subsoiling tillage, Huamei No. 1, KX3564, KWS2564, Xianyu335 in increasing planting density, the ear leaf inclination, the net photosynthetic rate, LAI and SPAD decreased slower than under rotary tilly, and their yield and density coefficient increased significantly. In addition, their responsiveness to the deep tillage was higher than Zhengdan958 and Denghai618.

关 键 词：玉米 深松耕作 耐密性 响应分析 

分 类 号：S513.047[农业科学—作物学]