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Studies on the Relationship Between Grain-yield and Climatic Ecological Factors in summer corn Under Super-high-yielding Cultivation Conditions

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Agricultural Sciences in China 2002年第2期1卷 169-176页

作者： LI Chao-hai, SU Xin-hong, XIE Rui-zhi, ZHOU Su-mei and LI Deng-hai( College of Agriculture , Henan Agricultural University, Zhengzhou 450002 Laizhou City Academy of Agricultural Science, Laizhou 261417) College of Agriculture Henan Agricultural University Zhengzhou 450002 Laizhou City Academy of Agricultural Science Laizhou 261417

Cultivation experiments on super-high-yield (^12000kg/ha) of summer corn (Zea mays L.) were conducted in Laizhou, Shangdong Province, from 1986 to 1997, and in Wenxian, Henan Province, from 1996 to 1997. The results showed that requirements of accumulated temperature and hours of sunshine for super-high-yield of summer corn could be met in normal years in the areas of the Huanghuaihai Plain. Amount of precipitation influenced the yield most strongly in indirect way among all the meteorological factors, and the relationship between them displayed significant negative correlation (r= - 0.5418). The regression equation between yield and amount of precipitation at seedling stage and grain filling stage both reached significant level, and the partial regression coefficients were - 4.8735 and - 13.7415, respectively. Further research revealed that the key climatic-ecological factors influencing yield were as fellows: the average temperature in the third and the ninth Xun (note: a Xun indicates ten days and the accounting of Xun was from the corresponding sowing date), the hours of sunshine in the sixth and the eighth Xun, the amount of precipitation in the sixth, the seventh and the second Xun. Results obtained by analyzing yield components of summer corn showed that grain numbers per ear (GN/E) made greater contribution to super-high-yield than kernel weight (KW) and the numbers of ears did. The key factors influencing GN/E were the amount of precipitation in the sixth and the eighth Xun and the hours of sunshine in the sixth Xun, with the correlation coefficients of -0.6074, 0.5793 and 0.5854, respectively.

关键词： Super-high-yielding cultivation summer corn Yield Climatic ecology

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The Agricultural Technology for Manuring and Sowing Simultaneously Applied to summer corn "Jinzhengda"

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Agricultural Science & Technology 2017年第1期18卷 110-113页

作者： Dongyi CHEN Fangju ZI Xiaoren CHEN Qingju WANG Jing ZHANG Yongxian CHEN Qishan LIU Shangshui County Bureau of Agriculture Shangshui 46610 China Kingenta Linshu 276700 China Harbin Exhibition and Convention Center Harbin 150009 China

[Objective] The aim was to get a high yield and simplify fertilization of summer corn in moisture soils in the east of Henan province. [Method] Effects of slow-release fertilizers special for summer corn on its yield, economic benefits and resistance. [Result] By the slow-release fertilizers containing 45% slow-release nitrogen, thousand-kernel weight and the number of ear went up by 28 g and 16 kernels, respectively. Slow-release fertilizers advanced nutrient uptake by summer corns and kept soil nitrogen balanced. In comparison to local fertilization approach, corn yield grew by 13.5% and net profit went up by 1 920 yuan/hm^2 by same-term application technique of seed ＆ slow-release fertilizer in comparison to local methods. In comparison to normal fertilizers containing the same-quantity nutrients, corn yield grew by 10.3% and net profit by 1 215 yuan/hm^2. [Conclusion] The research provides references for slow-release fertilizer promotion in production of corn in Zhoukou and innovation and integration between agricultural machines and techniques.

关键词： summer corn Moisture soil areas Slow-release fertilizer

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High-Yielding Cultivation Techniques of summer corn

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Agricultural Science & Technology 2017年第12期18卷 2309-2311页

作者：周军湖北省十堰市农科院湖北十堰442000

The high-yielding cultivation practice for summer corn were expounded, pointing out the points for attention in land selection before sowing, basal dressing, fine breed selection, sowing and seedling management.

关键词： summer corn Cultivation techniques High yield

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Spectral Characteristics Comparison of Two summer corn Cultivars under Different Fertilization Treatments

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Asian Agricultural Research 2017年第11期9卷 58-61页

作者： Luyan NIU Fengyun WANG Jiabo SUN Jiye ZHENG Xiaoyan ZHANG Institute of Science and Technology Information Shandong Academy of Agricultural Sciences

This study is aimed to explore the spectrum reflection characteristics of summer corn leaves in different fertilization *** hyperspectral remote sensing technology,the experiments were conducted in fields to collect the hyperspectral images of Denghai 605( DH605) and Ludan 981( LD981) in different growth period under five fertilization treatments,and then the reflectance of corn ear leaves was extracted by ENVI software. The five fertilization treatments included the control( CK) with no fertilization,40 kg and 30 kg of controlled-release fertilizer per 666. 67 m2 as base( K40 and K30),50 kg and 40 kg of compound fertilizer per 666. 67 m2 as base with 15 kg urea as seed fertilizer( F50 + N and F40 + N). The reflectance spectrums of the two corn cultivars under different fertilization treatments showed the approximately same changing trend with a reflection peak at green band( 550 nm) and a higher reflection platform at near infrared band( 760 nm-1050 nm). At the heading to filling stage,the reflectance of DH605 and LD981 was the highest under the CK,followed by the K30 and F40 + N respectively. At the filling to dough stage,the reflectance of DH605 and LD981 was the highest under the treatment K30 and F40 + N respectively,which was obviously higher than that of the other treatments. In the conditions of compound fertilizer,except the late filling stage,LD981 had little higher reflectance than DH605 at the other stages. In the conditions of controlled-release fertilizer and at dough to mature stage,LD981 had obviously higher reflectance compared to the other stages,and also higher than that of DH605; there was not obvious difference in reflectance LD981 and DH605 at the other stages.

关键词： Fertilization summer corn Ear leaf Spectral reflectance Spectral characteristics

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夏玉米高产、稳产与营养生理指标及环境因素关系的研究报告

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中国海洋大学学报(自然科学版) 1988年第S2期 1-18页

作者：李淑霞冯瑞龙赵继业刘绍棣程绍义青岛海洋大学莱阳农学院

目前,我国玉米生产的管理主要仍是靠传统的生产经验,但玉米的生长要受许多随机因素诸如气象、土壤以及其它人为因素的影响,因此,仅靠经验无法稳定地提高产量。作者认为通过大量的田间试验,依据农业科学理论,应用数学方法,分析试验数据,... 详细信息

目前,我国玉米生产的管理主要仍是靠传统的生产经验,但玉米的生长要受许多随机因素诸如气象、土壤以及其它人为因素的影响,因此,仅靠经验无法稳定地提高产量。作者认为通过大量的田间试验,依据农业科学理论,应用数学方法,分析试验数据,结合人们的生产经验,借助于电子计算机,建立作物生长模型以及产量与环境因素的相关模型,然后在计算机上运行模型,模拟作物的生产管理,进行规范化施肥,指导科学种田,这将是提高产量的一条可行的途径。本项研究是作者这一构思在指导玉米栽培管理中的一个初步尝试。

关键词： summer corn "Double S" model elasticity coefficient environmental factors

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