Potassium fertilization and water depths in maize (Zea mays L.) production used as silage in the Brazilian semiarid region

2014 ◽  
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Semiarid Region ◽  
Potassium Fertilization ◽  
Brazilian Semiarid ◽  
Water Depths

scholarly journals INSECTICIDE ACTIVITY OF PLANT EXTRACTS OF THE NORTHEASTERN BRAZILIAN FLORA FOR THE CONTROL OF Sitophilus zeamais [Mots, 1885] AND Sitotroga cerealela [Olivier, 1819

2019 ◽  
Vol 7 (8) ◽  
pp. 47-62
Author(s):  
Carlos alberto Santos
Keyword(s):  
Zea Mays ◽  
Plant Extracts ◽  
Zea Mays L ◽  
Job Creation ◽  
Rural Populations ◽  
Semiarid Region ◽  
Angoumois Grain Moth ◽  
Plant Powders ◽  
Insecticide Activity ◽  
Brazilian Flora

One of the typical crops of the semiarid tropic is the maize Zea mays L., a rustic plant cultivated in the Brazilian northeastern semiarid region mainly by small farmers. It is one of the sources of protein and carbohydrates and an economic alternative for job creation, especially for rural populations. Among the factors limiting its cultivation are pests, among which weevil and Angoumois grain moth. This work aims to evaluate the insecticide activity of plant extracts obtained from medicinal plants of the Brazilian northeastern flora for the control of Angoumois grain moth and weevil under laboratory conditions. The methodology consisted in the production of plant powders, which were mixed with 99.8% alcohol, and then macerated and filtered. Using a rotary evaporator and applying a water bath, it was possible to separate the alcohol from the filtered solution, resulting in a creamy paste, which is the extract itself, later used in tests with insects. Preliminary tests were applied at the concentrations of 0% [control] to 100% ml of extracts. Extracts with a mortality rate ³50% were analyzed by bioassays and four replicates, each consisting of a lot of five insects. The experimental design was completely randomized.

scholarly journals Optimization of Potassium Fertilization for Maize (Zea mays L.) in New Alluvial Zone of West Bengal

2020 ◽  
Vol 9 (9) ◽  
pp. 1518-1523
Author(s):  
Bappa Mandal ◽  
Sonali Biswas ◽  
Srabani Debnath ◽  
Abhijit saha ◽  
Susmita Moi ◽  
...  
Keyword(s):  
Zea Mays ◽  
West Bengal ◽  
Zea Mays L ◽  
Potassium Fertilization

scholarly journals Forage cactus-sorghum intercropping at different irrigation water depths in the Brazilian Semiarid Region

2017 ◽  
Vol 52 (9) ◽  
pp. 724-733 ◽  
Author(s):  
Wellington Jairo da Silva Diniz ◽  
Thieres George Freire da Silva ◽  
Jadna Mylena da Silva Ferreira ◽  
Djalma Cordeiro dos Santos ◽  
Magna Soelma Beserra de Moura ◽  
...  
Keyword(s):  
Irrigation Water ◽  
Saline Water ◽  
Cropping Systems ◽  
Block Design ◽  
Productivity Index ◽  
Biological Efficiency ◽  
Semiarid Region ◽  
System Productivity ◽  
Brazilian Semiarid ◽  
Water Depths

Abstract: The objective of this work was to evaluate the productive performance, biological efficiency, and the competitive ability of the forage cactus-sorghum intercropping under different irrigation depths with saline water in the Brazilian Semiarid Region. The experiment was carried out in Serra Talhada, in the state of Pernambuco, between 2014 and 2015, in a randomized complete block design, with four replicates, and a 5x3 factorial arrangement in split plots, with one year of forage cactus cycle and two years of sorghum cycles. The plots were composed by four irrigation water depths based on the fractions of 25, 50, 75, and 100% of the reference evapotranspiration, besides dry conditions; and the subplots consisted of three cropping systems (single crop of forage cactus, single crop of sorghum, and intercropping of forage cactus-sorghum). The increase of water irrigation depths increased the yields of sorghum in single crop and of the forage cactus-sorghum intercropping. The intercropping system promoted production stability with a higher system productivity index (SPI) for forage cactus-sorghum intercropping (6,279.02 kg ha-1 DM) than for forage cactus in single crop (4,626.98 kg ha-1 DM). The relative density coefficient (12.33) was indicative of the great compatibility of the intercropping system. The forage cactus-sorghum association shows biological advantage and competitiveness capacity, with a higher productive index than their monocultures.

scholarly journals Sunflower fertigated with potassium fertilization in two agricultural seasons in the Brazilian semiarid region

2020 ◽  
Vol 51 (2) ◽  
Author(s):  
Allysson Pereira dos Santos ◽  
Francilene de Lima Tartaglia ◽  
Almir Rogerio Evangelista de Souza ◽  
Manoel Galdino dos Santos ◽  
Lindomar Maria da Silveira ◽  
...  
Keyword(s):  
Semiarid Region ◽  
Potassium Fertilization ◽  
Brazilian Semiarid

scholarly journals Nitrogen Management in Maize Under Rainfed Conditions in the Brazilian Semiarid Region

2019 ◽  
Vol 11 (7) ◽  
pp. 86
Author(s):  
Micaela B. Pereira ◽  
José L. dos S. Gomes ◽  
Vademir R. Cavalcante ◽  
Bruno de S. Oliveira ◽  
Jackson T. Lobo ◽  
...  
Keyword(s):  
Plant Height ◽  
Zea Mays L ◽  
Dry Mass ◽  
Semiarid Region ◽  
Nitrogen Absorption ◽  
Nitrogen Levels ◽  
Brazilian Semiarid ◽  
Rainfed Conditions ◽  
Crop Cycle ◽  
Number Of Leaves

Zea mays L. presents socioeconomic and cultural importance for the Northeast region of Brazil, its yield is directly related to the productive system, to the edaphoclimatic conditions and to the soil management. The aim of this work was to evaluate the development and the yield of maize under different nitrogen doses in rainfed conditions in the Brazilian semiarid. The experimental design was in randomized blocks, with four treatments and five replications, totalizing 20 experimental plots, with 24 plants each. The treatments were: T1 (0 kg ha-1 of N); T2 (40 kg ha-1 of N); T3 (60 kg ha-1 of N) and T4 (80 kg ha-1 of N). Were evaluated: plant height, culm diameter and number of leaves at 30, 45, 60, 75 and 90 days after emergence; leaf temperature, stomatal conductance, transpiration, liquid photosynthesis and intercellular carbon concentration at 65 days after emergence; yield, shoot dry mass and nitrogen content in the soil after harvest. The different nitrogen doses significantly influenced the plant height, culm diameter and the number of leaves in the different evaluation periods, also influencing the nitrogen levels in the soil after the harvest. There was no difference among treatments for the yield, the registered average was 5,205 kg ha-1. The development of the crop and the nitrogen absorption may have been influenced by the water deficit during the crop cycle. The maize presented better agronomic performance with the dose of 60 kg ha-1 of nitrogen.

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