Immobilization of cadmium in soil and improved iron concentration and grain yields of maize (Zea mays L.) by chelated iron amendments

2021 ◽  
Author(s):  
Xing Zhang ◽  
Peng Zhang ◽  
Yanmei Hu ◽  
Yuqing Liu ◽  
Shanshan Feng ◽  
...  
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Iron Concentration ◽  
Grain Yields ◽  
Chelated Iron

scholarly journals Effect of Intercropping Dates of Lablab (Lablab purpureus L.) with Maize (Zea mays L.) on Forage and Maize Grain Yields

2020 ◽  
pp. 1-4
Author(s):  
Meseret Redae ◽  
Desta Tekle
Keyword(s):  
Zea Mays ◽  
Dry Matter ◽  
Zea Mays L ◽  
Block Design ◽  
Forage Yield ◽  
Lablab Purpureus ◽  
Grain Yields ◽  
Maize Grain Yield ◽  
Randomized Complete Block Design ◽  
Maize Grain

This study was conducted to evaluate effect of intercropping dates of lablab (Lablab purpureus L.) with maize (Zea mays L.) on forage and maize grain yields. It was carried out at Gereb Giba in Tanqua Abergelle district, Tigray, Ethiopia. Randomized Complete Block Design (RCBD) with four treatments and four replications were used. The treatments were sole maize sown (T1) and lablab sown at 10, 20 and 30 days after emergence of maize for T2, T3 and T4 respectively. Intercropping did not affect height and days for 50% flowering of lablab. Similarly, it was not affected height and days for physiological maturity of maize. Lablab forage yield was significantly greater (p<0.01) in T2 and T3 than T4. Maize Stover dry matter (DM) yield was similar among treatments while total forage DM yield was significantly higher (p<0.0001) in T2, T3 and T4 than T1. Moreover, among the intercrops, total forage yield was significantly highest (p<0.0001) for T2 compared to T4 but similar in T2 and T3. Maize grain yield was significantly superior (P<0.0001) in T2 and T3 compared to T1 and T4. Though, T2 and T3 had similarity in all parameters measured, T2 provided higher forage and maize grain yields than T1 and T4. Therefore, lablab intercropping at 10 days after emergence of maize is appropriate in Tanqua Abergelle district and other areas with similar agro ecologies.

scholarly journals Impact of Increasing Maize Densities on Agronomic Performances and the Community Stability of Productivity of Maize/Peanut Intercropping Systems

Agronomy ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 150 ◽  
Author(s):  
Haiyong Xia ◽  
Lan Wang ◽  
Yanfang Xue ◽  
Weilin Kong ◽  
Yanhui Xue ◽  
...  
Keyword(s):  
Zea Mays ◽  
Community Structure ◽  
Zea Mays L ◽  
Agronomic Traits ◽  
Community Stability ◽  
Grain Yields ◽  
Arachis Hypogaea L ◽  
Biomass Yields ◽  
Maize Grain ◽  
Positive Correlations

Rational crop community structure plays an important role in maximizing the intercropping yield advantage. Effects of increasing maize densities in maize (Zea mays L.)/peanut (Arachis hypogaea L.) intercropping on yields and other agronomic traits, and the community stability of productivity were conducted across three different experimental sites. There were significant and positive correlations between maize densities and both maize grain/biomass yields and corresponding partial land equivalent ratios (LERs) across all three locations; but grain/biomass yields and partial LERs of peanut were all negatively correlated with maize densities in each or across all locations. LERs of grain yields averaged over three locations ranged from 0.89 to 0.98, while LERs of biomass yields ranged from 0.94 to 1.09 (>1.0 except for the maize inter-plant distance of 27 cm), indicating the intercropping advantage on biomass yields but not grain yields. Peanut had significantly lower kernel harvest indexes than those in monoculture. Excessive narrowing maize inter-plant distances reduced the community stability of productivity severely (especially for maize and total LERs) and are more likely to lead to abnormal maize and peanut plants. Therefore, a rational increase of maize densities in intercropping is suggested to keep the balance between maize and peanut and the comprehensive yield advantage.

Corn yield, nitrogen uptake and nitrogen use efficiency as influenced by nitrogen fertilization

1994 ◽  
Vol 74 (2) ◽  
pp. 235-240 ◽  
Author(s):  
B. C. Liang ◽  
A. F. MacKenzie
Keyword(s):  
Zea Mays ◽  
Nitrogen Use Efficiency ◽  
Zea Mays L ◽  
Quadratic Functions ◽  
Price Ratio ◽  
Fertilizer N ◽  
Fertilizer Rate ◽  
Nitrogen Use ◽  
Grain Yields ◽  
Use Efficiency

Improving efficient use of applied nutrients in crop production is a desirable agronomic, economic, and environmental goal. Field experiments with corn (Zea mays L.) were carried out at two sites with contrasting soil textures in southwestern Quebec from 1988 to 1990. Objectives were to establish an optimum N fertilization rate for grain production, and to study fertilizer N use efficiency on a Chicot sandy clay loam (Grey Brown Luvisol) and a Ste. Rosalie clay (Humic Gleysol). Under favourable heat units and rainfall, yields of grain corn were quadratic functions of fertilizer N rates on both soils. Maximum grain yields of corn were calculated to require from 300 to 350 kg N ha−1 fertilizer application. However, large amounts of N fertilizer at both 285 kg ha−1 and 400 kg ha−1 were not recovered by the crop. Optimum economic grain yields at a price ratio of 10:1 N:grain were found at 273 kg N ha−1 on the Ste. Rosalie site in 1990, and 286 and 179 kg N ha−1 for 1989 and 1990, respectively, on the Chicot site. A normal fertilizer rate (170–44–141 kg N–P–K ha−1) and a high fertilizer rate (400–132–332 kg N–P–K ha−1) were used in 1989 and 1990 for 15N microplot experiments. Grain and stover fertilizer N recovery (FNR) varied with N rate and year from 9 to 58%. Favourable climatic conditions substantially increased crop yield, and thus crop FNR. Residual FNR the second year was less than 5% of the initial applied N. Key words:15N, grain yield, Zea mays L., nitrogen use efficiency, fertilization

scholarly journals Performance of Twelve Corn Hybrids and Selections in Three Consecutive Crops on the Same Site in the Same Year.

1969 ◽  
Vol 63 (2) ◽  
pp. 170-179
Author(s):  
A. Sotomayor-Ríos
Keyword(s):  
Zea Mays ◽  
Puerto Rico ◽  
Zea Mays L ◽  
Average Height ◽  
Average Yield ◽  
Bipolaris Maydis ◽  
Corn Hybrids ◽  
F1 Hybrid ◽  
Soil Disinfestation ◽  
Grain Yields

Twelve corn (Zea mays L.) hybrids and selections were planted three times on the same site in the same year at Isabela, Puerto Rico, according to the following schedule: Nov. 5, 1975 (crop 1); April 21, 1976 (crop 2); and Aug. 13, 1976 (crop 3). Average time to midsilk for the 12 entries was similar in crops 1 and 3 (621 and 6 1.6 days, respectively) but was shorter in crop 2 (59.1 days). Average height to the base of the lowest ear for the 12 entries was 87.1, 106.3, and 99.0 cm for crops 1, 2, and 3, respectively. Average test weight was highest (81.2 kg/hl) in crop 1, decreasing to 72.4 and 55.0 kg/hl in crops 2 and 3, respectively. Average severity of leaf blight, caused by Bipolaris maydis (Nisikado) Shoemaker, was similar in crops 1 and 2. Tne best grain yielder in all three crops was hybrid Pioneer 304 C, with yields of 5,975, 4,103, and 3,729 kg /ha in crops 1, 2, and 3, respectively. The average yield for the 12 entries was 4,598, 3,180, and 2,523 kg/ha in crops 1, 2, and 3, respectively. Nematodes in plots were counted and identified after crop 3 was harvested. The nematode most commonly found in the rhizosphere was Pratytenchus zeae. Plots with Pioneer 304 C, the top yielder, had the second lowest nematode count, 480 per 250 cm3 of soil. Plots with PR-3 and the F1 hybrid PRMo2 x PR-3 had the highest nematode counts, 1040 and 1232 per 250 cm3 of soil, respectively. Although soil disinfestation might have resulted in higher yields, this study showed that three corn crops grown on the same site during the same year can produce grain yields of more than 13,000 kg/ha (205 bu/acre).

INFLUENCE OF HERBICIDE USE AND INTER-ROW TILLAGE ON CORN YIELDS AND SOIL CONDITIONS

1984 ◽  
Vol 64 (2) ◽  
pp. 405-409 ◽  
Author(s):  
D. R. COOTE ◽  
W. J. SAIDAK
Keyword(s):  
Zea Mays ◽  
Bulk Density ◽  
Soil Structure ◽  
Zea Mays L ◽  
Soil Bulk Density ◽  
Soil Conditions ◽  
Grain Yields ◽  
Tillage Operation ◽  
Hand Weeding ◽  
Herbicide Use

Six herbicide treatments and hand weeding of grain corn (Zea mays L.) were compared with and without a single inter-row tillage operation in June. Grain yields were significantly increased by tillage and negatively correlated with weed weights. In a subset of plots, surface soil bulk density was lower, and air-filled porosity was higher after the tillage. Bulk densities were decreased in September by a possible interaction between inter-row tillage and herbicide use. Grain yields were negatively correlated with bulk density in June and positively correlated with soil moisture in September, suggesting that some of the yield improvement from tillage was the result of better soil physical conditions.Key words: Zea mays L., atrazine, herbicides, tillage, soil structure, bulk density

The effects of dazomet and nitrogen fertilizer on successive crops of maize (Zea mays L.) grown for either grain or forage

1982 ◽  
Vol 98 (1) ◽  
pp. 7-15 ◽  
Author(s):  
A. J. Barnard ◽  
D. Hornby
Keyword(s):  
Zea Mays ◽  
Nitrogen Fertilizer ◽  
Dry Matter ◽  
Zea Mays L ◽  
Grain Yields ◽  
Nodal Roots ◽  
Seminal Roots

SUMMARYMaize was grown for grain or forage on the same site at Woburn for 7 consecutive years. Yields were satisfactory and there were no serious pest or disease problems, provided the small plots were netted until young plants were established. Different rates of nitrogen fertilizer were tested with and without annual applications of a soil sterilant, dazomet. Average yields of grain (85% dry matter) and forage (dry matter) were respectively 4·5 and 8·8 t/ha with 50 kg N/ha and 5·0 and 9·5 t/ha with 100 kg N/ha. Without dazomet there was a further increase with 150 kg N/ha. Weather influenced the response to nitrogen, and the response to a split dressing of the highest rate was variable. Except for plots receiving the split dressing of N in 1973 and 1974 dazomet always increased yields: grain yields were increased on average by 1 t/ha and forage by 1·6 t/ha. Dazomet-treated plots had taller and heavier plants with more stems, leaves and nodal roots, but fewer seminal roots than untreated plots. Dazomet-treated plots also had fewer migratory nematodes and smaller and less varied root myoofloras. Most of these differences were greatest in the young crop and possible reasons for this ‘early boost’ are discussed.

scholarly journals Corn Variety Trials on a Eutrustox in Puerto Rico

1969 ◽  
Vol 66 (3) ◽  
pp. 223-234
Author(s):  
G. L. Spain ◽  
S. P. Nightengale ◽  
J. Badillo-Feliciano
Keyword(s):  
Zea Mays ◽  
Puerto Rico ◽  
Zea Mays L ◽  
Northwest Coast ◽  
Grain Yields ◽  
Variety Trials ◽  
Fourth Trial ◽  
Agricultural Experiment

Four corn (Zea mays L.) variety trials were conducted during 1976-78 at the Isabela Agricultural Experiment Substation near the northwest coast of Puerto Rico. The Pioneer brand hybrid X304C ranked highest in three experiments with yields of 9, 782, 3,962 and 8,998 kg/ha of 15.5%-moisture grain, and was second only to X5800 (6,559 kg/ha) in a fourth trial with 5,856 kg/ ha. Other leading hybrids were X304A, X304B, X306B, X105A, H638 and H652. While certain hybrids and local open pollinated varieties yielded significantly less, grain yields among the top ranked entries in each experiment were not significantly different.

Influence de l'âge sur les caractéristiques photosynthétiques de la feuille de maïs, Zea mays L

Agronomie ◽  
1982 ◽  
Vol 2 (2) ◽  
pp. 159-166 ◽  
Author(s):  
Olivier BETHENOD ◽  
Christine JACOB ◽  
Jean-Claude RODE ◽  
Jean-François MOROT-GAUDRY
Keyword(s):  
Zea Mays ◽  
Zea Mays L

PRODUKTIVITAS PUPUK ORGANIK TERHADAP HASIL TANAMAN JAGUNG (Zea mays L) DI TANAH MINERAL

1970 ◽  
Vol 3 (2) ◽  
pp. 318-326
Author(s):  
Yoyon Riono.
Keyword(s):  
Zea Mays ◽  
Zea Mays L

Penelitian tentang pengaruh pemberian produktivitas pupuk organik terhadap hasil Tanaman Jagung (Zea mays L) di tanah mineral penelitian ini di laksanakan pada bulan Februari sampai Mei, yang bertempat di Sungai Salak Kecsmstsn Tempuling Kabupaten Indragiri Hilir Provinsi Riau. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) yang disusun secara faktorial yang terdiri dari 2 faktor dan 3 ulangan. Faktor B adalah bokashi pupuk kandang yang terdiri dari 4 taraf yaitu B0 (tanpa pemberianpupuk kandang), B1 (5 ton/ha) dan B2 (10 tom/ ha), serta B3 (15 ton/ha) Parameter yang di amati adalah tinggi tanaman, panjang daun ke tujuh, berat brangkasan basah, berat berangkasan kering, berat tongkol pertanaman sampel, diameter tongkol , produksi per plot, dan berat 100 biji. Selanjutnya data yang di peroleh di olah secara statistik, apabila F hitung lebih besar dari F tabel di lanjutkan dengan uji lanjut Tukey HSD pada taraf 5%. Hasil penelitian menunjukan bahwa interaksi bokashi pupuk kandang dan varietas berpengaruh nyata terhadap berat tongkol dan produksi dan produksi per plot, akan tetapi tidak berpengaruh nyata terhadap tinggi tanaman, panjang daun ke tujuh, berat brangkasan basah, berat brangkasan kering , diameter tongkol dan berat 1000 biji. Untuk perlakuan bokashi pupuk kandang secara tunggal berpengaruh nyata terhadap terhadap diameter tongkol , akan tetapi tidak berpengaruh nyata terhadap tinggi tanaman, panjang daun ke tujuh, berat brangkasan basah, berat brangkasan kering, berat tongkol, produksi per plot, dan berat 1000 biji, perlakuan bokashi terbaik terdapat pada pemberian 15 ton/ha. Sedangkan perlakuan varietas secara tunggal berpengaruh nyata terhadap berat brangkasan basah, berat tongkol, dan produksi per plot seta berat 1000 biji, akan tetapi tidak berbeda nyata dengan tinggi tanaman, panjang daun ke tujuh, berat brangkasan kering, dan diameter tongkol. Varietass terbaik adalah NT 10

Relaciones genéticas en muestras de razas mexicanas de maíz (Zea mays L.)

2020 ◽  
Vol 13 (3) ◽  
Author(s):  
Luis Angel Barrera Guzman ◽  
Juan Porfirio Legaria Solano
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Palabras Clave

Objetivo: Caracterizar muestras representativas de razas mexicanas de maíz con marcadores moleculares ISSR, que ayuden a inferir relaciones genéticas vinculadas a su origen, morfología, aspectos ecogeográficos, distribución y usos. Diseño/metodología/aproximación: Se emplearon 54 muestras representativas de razas mexicanas de maíz caracterizadas con diez marcadores moleculares ISSR. Las distancias genéticas se calcularon con el coeficiente Dice y se generó un dendrograma con el método de agrupamiento jerárquico de varianza mínima de Ward. Para visualizar las muestras en dos dimensiones se efectúo un Análisis de Coordenadas Principales con el método de varianza mínima estandarizada. Resultados: En 76 loci detectados, el análisis de agrupamiento con una R2 semiparcial de 0.04 formó cinco grupos que compartieron características filogenéticas, ecogeográficas, morfoagronómicas, de distribución y usos especiales. El análisis de coordenadas principales mostró 21.2 % de la variación total para las dos primeras coordenadas. La primera coordenada principal explicó el 12.43 % de la variación total y separó las muestras por ubicación geográfica y usos especiales; la segunda coordenada principal explicó el 8.77 % de la variación total y separó las muestras por rangos altitudinales y ciclo biológico. Limitaciones del estudio/implicaciones: Se empleó únicamente una muestra representativa por cada raza de maíz, considerando la variabilidad genética de este cultivo se deben incluir más muestras de la misma raza. Hallazgos/conclusiones: Las relaciones genéticas entre las muestras de razas de maíz obedecen a patrones altitudinales y geográficos; aunque algunos agrupamientos compartieron aspectos filogenéticos, morfoagronómicos, de distribución y usos. Palabras clave: Variabilidad genética, recursos fitogenéticos, caracterización molecular, clasificación integral.

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