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RESPONSE OF SUMMER MAIZE GRAIN YIELD AND PRECIPITATION-USE EFFICIENCY TO STRAW MULCHING IN NORTH CHINA PLAIN

文献类型： 外文期刊

作者： Li, Zongxin 1 ; Bian, Chengyue 2 ; Liu, Xinhui 2 ; Ma, Changjian 2 ; Li, Quanqi 2 ;

作者机构： 1.Shandong Acad Agr Sci, Maize Res Inst, Jinan 250100, Shandong, Peoples R China

2.Shandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An 271017, Shandong, Peoples R China

关键词： straw mulching;growth stage;yield composition;dry matter;rain-fed maize

期刊名称：ROMANIAN AGRICULTURAL RESEARCH （ 影响因子：0.5； 五年影响因子：0.616 ）

ISSN： 1222-4227

年卷期： 2017 年 34 卷

页码：

收录情况： SCI

摘要： The limited water resources have compelled the farming community to implement water-saving measures in rain-fed farmland. In 2009, 2010 and 2011 summer maize growing seasons, 0, 0.6, and 1.2 kg/m(2) straw mulching rates were employed to evaluate the effect of straw mulching on the contribution of dry matter remobilization to grain yield (CDMRG), grain yield (GY), and precipitation-use efficiency (PUE) of summer maize in rain-fed farmland. The results indicated that both 0.6 and 1.2 kg/m(2) straw mulching rates resulted in a significantly increased aboveground dry matter accumulation at maturity stage. Thus, compared to 0 kg/m(2) straw mulching rate, the CDMRG was significantly increased in both 0.6 and 1.2 kg/m(2) straw mulching rates. With regard to GY, no matter in moderate or humid years, straw mulching increased the summer maize GY, mainly due to the fact that 1000-kernels weight or rows per ear were significantly enhanced. In moderate years, regardless if precipitation was concentrated in the early or the late summer maize growth stages, the PUE in 1.2 or 0.6 kg/m(2) straw mulching rates were significantly higher than without mulching; in humid year, the PUE in both 0.6 and 1.2 kg/m(2) straw mulching rates were significantly higher than in 0 kg/m(2) straw mulching rate. Hence, no matter in moderate or humid years, straw mulching in summer maize growing season not only achieved the highest GY, but also the highest PUE. The results of this study suggest that, in rain-fed farmland, straw mulching facilitates better summer maize production in North China Plain.

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