Maize yield, biomass and grain quality traits responses to delayed sowing date and genotypes in rain-fed condition
文献类型： 外文期刊
作者： Cao, Qingjun 1 ; Li, Gang 1 ; Yang, Fentuan 1 ; Jiang, Xiaoli 1 ; Diallo, Lamine 2 ; Zhang, Enping 2 ; Kong, Fanli 1 ;
作者机构： 1.Jilin Acad Agr Sci, Key Lab Northeast Crop Physiol Ecol & Cultivat, Minist Agr & Rural Affairs Peoples Republ China, Changyi, Peoples R China
2.Jilin Univ, Coll Plant Sci, Changchun 130062, Jilin, Peoples R China
关键词： Delayed sowing date; Rain-fed condition; Maize; Grain quality; Climate change
期刊名称：EMIRATES JOURNAL OF FOOD AND AGRICULTURE （ 影响因子：1.041； 五年影响因子：1.282 ）
ISSN： 2079-052X
年卷期： 2019 年 31 卷 6 期
页码：
收录情况： SCI
摘要： sowing (DS) is a critical factor influencing grain yield and quality under climate change. This study was conducted to determine maize grain yield and quality traits responses to DS and varied genotypes in rain-fed condition, northeast of China. Two typical hybrids ZD958 (higher starch type) and LM33 (higher protein type) and three sowing dates: 30 April (DS0) as normal, 10 May (DS10) and 20 May (DS20) were compared. Results demonstrated maize grain yield, biomass, kernel number per square, thousand kernel weight (TKW), grain nutrition yield, N concentration and grain test weight were significantly reduced by DS. Compared to high protein type LM33, high starch type ZD958 had a higher yield potential and lower yield reduction with delayed sowing. Grain yield loss under DS could be mainly attributed to reduction of the BMP and biomass, thereby leading to the reduction of TKW and kernels number per unit. DS didn't affected grain nutritional content (starch, protein and oil), while significantly reduced grain nutrition yield of starch, oil and protein with delayed sowing. This study suggests that, early sowing should be recommended to the framers and varieties adjustments maybe a possible approach to reduce and compensate for the loss of yield caused by delayed sowing in rain-fed condition under climate change in NCP.
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