Effect of Different Levels of Potassium on Yield and Yield Attributes of Kharif Maize (Zea mays L.)

RESUMO - O objetivo deste estudo foi avaliar as características morfoagronômicas do híbrido simples de milho em função da aplicação de diferentes intensidades de desfolha artificial, realizadas no estádio R1 de desenvolvimento. O experimento foi conduzido na área experimental do Instituto Federal Goiano,em Morrinhos-GO, na safra 2015/2016. Foi aplicado o delineamento de blocos completamente casualizados, com oito tratamentos e quatro repetições, sendo eles: remoção de uma folha acima e uma abaixo da espiga; remoção de duas folhas acima e abaixo da espiga; remoção de três folhas acima e abaixo da espiga; remoção de todas as folhas da planta; remoção de todas as folhas acima da espiga; remoção de todas as folhas abaixo da espiga; remoção da folha da espiga; e testemunha sem desfolha. Os caracteres avaliados foram: estande de plantas, número de plantas acamadas, prolificidade, densidade de colmo, comprimento e diâmetro de espiga, comprimento de grão, massa de mil grãos, massa de grãos espiga-1 e produtividade. Os dados foram submetidos à análise de variância pelo teste F a 5% de probabilidade, observando que todas as variáveis avaliadas foram influenciadas quanto aos efeitos dos tratamentos empregados. O enchimento dos grãos esteve intimamente relacionado à fotossíntese. Sem as folhas, esta fase ficou plenamente comprometida.Palavras-chave: Zea mays, fotoassimilados, translocação, índice de área foliar, rendimento. MORPHOAGRONOMIC CHARACTERISTICS OF MAIZE AS A FUNCTION OF DIFFERENT LEVELS OF ARTIFICIAL DEFOLIATION ABSTRACT - The objective of this study was to evaluate of morphoagronomic characteristics of simple hybrids of maize, depending on the application of different intensities of artificial defoliation, carried out in R1, when the style-stigma were fertilized. The experiment was conducted in an experimental area of the Instituto Federal Goiano, Campus Morrinhos, State of Goiás, Brazil, during the agricultural year 2015/2016. We applied the design of completely randomized block with eight treatments, in four replications: removal of a leaf above and one below the ear; removal of two leaves above and below the ear; removal of three leaves above and below the ear; removal of all leaves of the plant; removal of all leaves above the ear; removal of all leaves below the ear; removal of the leaf of the ear; and control without defoliation. The traits evaluated were stand of plants, number of plant lodging, prolificacy, density, length and diameter of the cob, length of a grain, weight of a thousand grains, grain mass cob-1 and productivity. The data obtained were subjected to analysis of variance by F test at 5% probability, noting that all variables were influenced as to the effects of the treatments used. The filling of grains is closely related to photosynthesis. Without the leaves, this phase was fully damaged.Keywords: Zea mays L., photoassimilates, translocation, leaf area index, yield.

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Response of fodder maize to different levels of nitrogen undervarious planting methods

Indian Journal of Agricultural Research ◽

10.18805/ijare.v0iof.10780 ◽

2016 ◽

Author(s):

Rupinder Kaur Jassal ◽

Avtar Singh ◽

J. S. Kang ◽

Thakar Singh

Keyword(s):

Zea Mays ◽

Seed Yield ◽

Zea Mays L ◽

Conventional Tillage ◽

Zero Tillage ◽

Nitrogen Levels ◽

Planting Methods ◽

Stover Yield ◽

Planting Method ◽

Different Levels

The experiment was conducted to find out the planting method and nitrogen level for enhancing the seed yield of fodder maize (Zea mays L.). The treatment comprised of three planting methods as zero tillage (ZT), conventional tillage (CT) and bed planting (BP) and four nitrogen levels (0, 100, 125 and 150 kg N/ha). Successive increase of 25kg N/ ha has significantly increased the seed and stover yield of maize with which significantly higher values of plant height, stover yield and shelling percentage was obtained.

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Heterosis among populations of maize (Zea mays L.) with different levels of exotic germplasm

Theoretical and Applied Genetics ◽

10.1007/bf00262514 ◽

1987 ◽

Vol 73 (3) ◽

pp. 445-450 ◽

Cited By ~ 27

Author(s):

J. Crossa ◽

C. O. Gardner ◽

R. F. Mumm

Keyword(s):

Zea Mays ◽

Zea Mays L ◽

Exotic Germplasm ◽

Different Levels

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Root-shoot ratio of maize (Zea mays L.) as influenced by different levels of water deficit under two different climatic conditions

Journal of Zankoy Sulaimani - Part A ◽

10.17656/jzs.10655 ◽

2018 ◽

Vol 2ndInt.Conf.AGR (Special Issue) ◽

pp. 87-96

Author(s):

Mardin Othman Othman ◽

◽

Aram Abbas Mohammed Mohammed ◽

Keyword(s):

Zea Mays ◽

Water Deficit ◽

Zea Mays L ◽

Climatic Conditions ◽

Shoot Ratio ◽

Root Shoot Ratio ◽

Different Levels

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Effect of agronomic biofortification on growth, yield, uptake and quality characters of maize (Zea mays .L) through integrated management practices under North-eastern region of Tamil Nadu, India

Journal of Applied and Natural Science ◽

10.31018/jans.v13i1.2539 ◽

2021 ◽

Vol 13 (1) ◽

pp. 278-286

Author(s):

Augustine R. ◽

D. Kalyanasundaram

Keyword(s):

Zea Mays ◽

Tamil Nadu ◽

Management Practices ◽

Zea Mays L ◽

Foliar Application ◽

Mineral Fertilizers ◽

Eastern Region ◽

Yield Attributes ◽

North Eastern ◽

Agronomic Biofortification

Agronomic biofortification increases the concentration of target mineral in edible portions of crops by the use of mineral fertilizers to increase dietary intake of target minerals. Among these iron and zinc deficiencies in human nutrition are noticed in countries where maize is the staple food. The objective of this study was to evaluate agronomic biofortification performance in association with Integrated Nutrient Management in maize (Zea mays .L). The study was conducted under field conditions in Chinnakandiankuppam village, Vriddhachalam Taluk, in the North-eastern region of Tamil Nadu state, India of Kharif 2020 season. Two hybrids in main plots (M1 – Non biofortified and M2 – Biofortified) were combined with six treatments in sub-plots (100 % RDF through NPK (S1), 100 % RDF through FYM (S2), 50% RDF through NPK + 50% through FYM (S3) as soil application, S1+ Zinc + Iron (S4), S2 +Zinc + Iron (S5) and S3 + Zinc + Iron (S6) as foliar application with evaluations were carried out in wet season period of the year. Application of 50 percent RDF through NPK + 50 percent RDF through FYM with Fe, Zn, foliar applications (S6) was the most efficient agronomic biofortification practice for growth attributes, yield and yield attributes, nutrient uptake, and quality parameters for the maize cropping system under the irrigated condition of the northeastern zone of Tamilnadu State, India.

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