文献类型： 外文期刊
第一作者： Li, L. J.
作者： Li, L. J.;Gu, W. R.;Wei, S.;Li, C. F.;Li, W. H.;Chen, X. C.;Zhang, L. G.
作者机构：
期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）
ISSN： 0002-1962
年卷期： 2019 年 111 卷 2 期
页码：
收录情况： SCI
摘要： The combination of ethephon (2-chloroethyl phosphonic acid, ETH) and 2-diethylaminoethyl-3,4-dichlorophenylether (DCPTA) has been used in maize (Zea mays L.) production in Northeast China, but limited information is available on the effectiveness of ETH+DCPTA. In this study, field experiments were conducted with two maize hybrids, ZhengDan 958 ('ZD958') and DongNong 254 ('DN254'), which were planted at a density of 75,000 plants ha(-1), to study the influence of ETH, DCPTA, and ETH+DCPTA on stalk quality (rind penetration strength [RPS], stalk bending strength [SBS], dry weight per unit, cross-sectional area, and rind thickness), photosynthetic characteristics, bleeding sap, dry matter accumulation (DMA), and yield. Ethephon significantly reduced the lodging rate, plant height, ear height, and center of gravity of both maize hybrids and increased the RPS, SBS, dry weight per unit, cross-sectional area, and thickness over the 2 yr. Ethephon also significantly decreased the leaf area index (LAI), chlorophyll content (SPAD value), net photosynthetic rate (Pn) and bleeding sap levels and accelerated leaf senescence, which ultimately decreased the yields. Although the application of DCPTA tended to increase the LAI, Pn, and bleeding sap levels and delayed leaf senescence, the plant height, ear height and the center of gravity also increased markedly, resulting in poorer stalk lodging resistance and higher lodging rate. Greater green leaf area, photosynthetic ability and bleeding sap levels and delayed leaf senescence in response to ETH+DCPTA mainly contributed to the increased postanthesis DMA. Thus, the application of ETH+DCPTA could provide a stable method for increasing the maize grain yield.
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