發(fā)布時(shí)間：2018-08-31 12:18

【摘要】：基于2012～2014年遼寧省莊河市和錦州市進(jìn)行的玉米分期播種試驗(yàn)資料,對(duì)遼寧地區(qū)玉米生長(zhǎng)及產(chǎn)量受溫度和水分影響情況進(jìn)行分析。結(jié)果表明:在日照和水分條件都適宜的情況下,玉米在各生長(zhǎng)發(fā)育期所持續(xù)的時(shí)間與相應(yīng)期間的溫度存在著負(fù)相關(guān)關(guān)系,播種～出苗階段持續(xù)時(shí)間在日最低氣溫15℃以下隨著溫度升高而逐漸縮短,15℃以上則縮短趨勢(shì)放緩。隨著播期的延后吐絲～成熟階段所持續(xù)的時(shí)間越來越長(zhǎng)。在出苗～吐絲階段,由于經(jīng)歷的溫度條件相差不大,因此播期間的差別并不十分顯著。吐絲～成熟期≥10℃的活動(dòng)積溫和氣溫日較差分別在1500℃·d左右和8～8.5℃的范圍內(nèi)對(duì)產(chǎn)量的形成更加有利。將水分作為環(huán)境的單一控制因素與對(duì)照組(CK)相比,三葉～拔節(jié)期受干旱脅迫后,該階段所需的時(shí)間較CK組延遲了3天,且對(duì)后續(xù)的發(fā)育期的長(zhǎng)短及單株葉面積仍有影響。在拔節(jié)～吐絲期,玉米的株高增長(zhǎng)量受干旱脅迫的抑制作用最大,2011～2013年分別下降33.6%、41.1%及24.3%;同時(shí),對(duì)莖粗、穗粒重及百粒重都有著顯著的影響。在吐絲～乳熟期干旱脅迫對(duì)株高的影響不顯著,但嚴(yán)重影響玉米產(chǎn)量,2011～2013年下降幅度分別為47.5%、54.6%和42.5%。
[Abstract]:Based on the experimental data of maize seeding by stages in Zhuanghe City and Jinzhou City Liaoning Province from 2012 to 2014 the effects of temperature and moisture on maize growth and yield in Liaoning Province were analyzed. The results showed that there was a negative correlation between the duration of maize growth and development period and the temperature of the corresponding period under the suitable conditions of sunshine and water. The duration of seeding to seedling stage decreased gradually above 15 鈩，

本文編號(hào)：2214965