scholarly journals Productivity and establishment of DRIS indexes for cultivation of potato cultivar Asterix tubers in a dystrophic Red Latosol

2019 ◽  
pp. 1017-1024
Author(s):  
Angélica de Araújo Queiroz ◽  
Atalita Francis Cardoso ◽  
Carolina Oliveira da Silva ◽  
Reginaldo de Camargo ◽  
Regina Maria Quintão Lana ◽  
...  
Keyword(s):  
Potato Cultivar ◽  
High Productivity ◽  
Relative Demand ◽  
Potato Culture ◽  
Limiting Nutrients ◽  
Phosphorus And Potassium ◽  
Red Latosol ◽  
N Rates ◽  
Nitrogen Phosphorus ◽  
Different Doses

The potato culture has the highest relative demand for fertilizers per unit area, around 2.3 to 2.8 t ha-1. The objective of this study was to evaluate the productivity of a potato Asterix cultivar subjected to different doses of nitrogen, phosphorus, and potassium, and to establish the DRIS index according to productivity results. The experimental design was randomized blocks, with 5 rates and 4 replicates for each nutrient totalizing 20 plots per experiment. The rates of nutrients were: nitrogen (0, 70, 140, 210 and 240 Kg ha-1); phosphorus (0, 200, 400, 600 and 800 kg ha-1) and potassium (0, 150, 300, 450 and 600 kg ha-1). For leaf diagnosis by the DRIS index, 10 complete leaves of the third expanded trifoliate were collected. The DRIS standards calculations were based on populations of high productivity (or reference) and low productivity. Plants whose productivities were greater than 22 t ha-1 represented the groups of reference. It was concluded that productivity was not influenced by the P and K doses studied, with an increase in yield of tubers as a function of the N rates applied, up to the dose of 173 kg ha-1 of N. According to the DRIS index, it is possible to establish the order of limiting nutrients for failure in descending order in areas with high productivity Ca> Mn> P> S> Zn = Cu> K> N> B> Fe> Mg, and the order of limiting nutrients in areas of low productivity Ca> Cu> Mg> P> S> Mn> Zn> K> Fe = B> N. The results showed that productions above 22 t ha-1 need adjustments of the soil fertility managements.

scholarly journals PENGGUNAAN BATANG PISANG KEPOK (Musa paradisiaca formmatypica) DENGAN DOSIS BERBEDA DALAM MENUMBUHKAN PAKAN ALAMI

2020 ◽  
Vol 8 (2) ◽  
pp. 129-140
Author(s):  
Natalia Lusia Igo ◽  
Ade Yulita Hesti Lukas ◽  
Yudiana Jasmanindar
Keyword(s):  
The Body ◽  
Nitrogen And Phosphorus ◽  
Musa Paradisiaca ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Different Doses

This research was conducted for a month, in the laboratory of the Faculty of Marine and Fisheries of Nusa Cendana University. The study aims to determine the use of a banana kepok stem (Musa paradisiaca formmatypica) with different doses to see the type of natural feeds growing and the abundance of it. The banana kepok stem (Musa paradisiaca  formmatypica) generally contains nitrogen, phosphorus and potassium. Nitrogen and phosphorus important to growing of natural feeds, while potassium important to increase the body durability of it. This study uses different dosages to see the abundance of natural feed. The dose used is 50 g.L-1, 75 g.L-1, 100 g. L-1. The results of the study showed the type of natural feed that grows are Daphnia sp and Infusoria and the highest amount of natural feed density in the treatment with dose of 75 g that is Infusoria as much as 356x104 cells.ml-1 and Daphnia sp as much as 168x104 cells.ml-1. The use of stem banana kepok (Musa paradisiaca formmatypica) can be used as feed for fish. Keywords: Banana kepok  stem (Musa paradisiaca formmatypica),  Dosages, Natural feed

scholarly journals Liquid organomineral fertilizer containing humic substances on soybean grown under water stress

2016 ◽  
Vol 20 (5) ◽  
pp. 408-414 ◽  
Author(s):  
Marcelo R. V. Prado ◽  
Oscarlina L. dos S. Weber ◽  
Milton F. Moraes ◽  
Carlos L. R. dos Santos ◽  
Morgana S. Tunes
Keyword(s):  
Water Stress ◽  
Grain Yield ◽  
Humic Substances ◽  
Stress Condition ◽  
Water Stress Condition ◽  
Plant Emergence ◽  
Soybean Plants ◽  
Phosphorus And Potassium ◽  
Red Latosol ◽  
Nitrogen Phosphorus

ABSTRACT This study evaluated the effect of an organomineral fertilizer enriched with humic substances on soybean grown under water stress. The experiment was performed in a greenhouse using a Red Latosol (Oxisol) with adequate fertility as substrate, in which soybean plants were cultivated with and without water stress. The experimental design was randomized blocks, in a 2 x 5 factorial scheme (two moisture levels and five fertilizer doses: 0, 1, 2, 4 and 8 mL dm-3), totaling 10 treatments, with four replicates. The organomineral fertilizer was applied in the soil 21 days after plant emergence and the water regimes were established one week thereafter. The fertilizer was not able to attenuate the effects of water stress, reducing soybean grain yield by more than 50% compared with plants cultivated under no stress. Fertilizer doses caused positive response on soybean nutrition and grain yield and, under water stress condition, the most efficient dose was 5.4 mL dm-3. There were lower leaf concentrations of nitrogen, phosphorus and potassium and higher concentrations of sulfur in plants under stress. Humic substances favor the absorption of micronutrients.

scholarly journals Assimilation of basic nutrients from soil and mineral fertilizers of grain wheat on the black grain of the podzolized sand of the Right-bank Forest-steppe of Ukraine

2020 ◽  
Vol 107 (3) ◽  
pp. 35-44
Author(s):  
H. Hospodarenko ◽  
◽  
O. Cherno ◽  
V. Boiyko ◽  
V. Liubych
Keyword(s):  
Winter Wheat ◽  
Mineral Fertilizers ◽  
Forest Steppe ◽  
Wheat Grain ◽  
Yield And Quality ◽  
Heavy Clay ◽  
Phosphorus And Potassium ◽  
The Right ◽  
Nitrogen Phosphorus ◽  
Different Doses

Assimilation of basic nutrients from soil and mineral fertilizers of grain wheat on the black grain of the podzolized sand of the Right-bank Forest-steppe of Ukraine The effect results of prolonged use of different doses and ratios of fertilizers on chernozem podzolized in a field crop rotation under the conditions of Right-Bank Forest-steppe of Ukraine on the content of essential nutrients in winter wheat grain and straw, the precursor of which was soybean, were shown. It has been found that, due to different doses, ratios and types of fertilizers, the nitrogen content of winter wheat grain increased by 13–49%, phosphorus by 3–19%, and potassium by 6–14%. With grain, winter wheat absorbs nitrogen most – 49.4–147.8 kg/ha and phosphorus – 22.1–51.9 kg Р2О5/ha, and potassium – only 15.0–32.6 kg K2О/ha, depending on yield and quality. It is estimated that 27–33% of nitrogen, 35–36% – of phosphorus and 74–76% of potassium are returned to the soil with winter wheat straw from economic removal depending on fertilizer doses. Keywords: winter wheat, podzolic heavy clay loam chernozem, content of nitrogen, phosphorus and potassium, economic removal.

scholarly journals DESENVOLVIMENTO DE MUDAS DE Swietenia macrophylla EM RESPOSTA A NITROGÊNIO, FÓSFORO E POTÁSSIO

FLORESTA ◽  
2011 ◽  
Vol 41 (3) ◽  
Author(s):  
Carlos Alberto Franco Tucci ◽  
José Zilton Lopes Santos ◽  
Clauzio Heitor da Silva Júnior ◽  
Patrícia Aparecida de Souza ◽  
Iza Maria Paiva Batista ◽  
...  
Keyword(s):  
Dry Weight ◽  
Swietenia Macrophylla ◽  
Nitrogen And Phosphorus ◽  
Nitrogen Levels ◽  
Phosphorus And Potassium ◽  
Red Latosol ◽  
Para Determinar ◽  
Nitrogen Phosphorus ◽  
Phosphorus Levels

Objetivou-se avaliar neste estudo o efeito de nitrogênio, fósforo e potássio no crescimento de mudas de mogno. As plantas foram cultivadas num Latossolo Amarelo Distrófico argiloso com seis níveis de nitrogênio (0, 50, 100, 125, 150 e 200 kg N ha-1), seis níveis de fósforo (0, 75, 150, 225, 300 e 400 kg P2O5 ha-1) e seis níveis de potássio (0, 40, 80, 120, 160 e 200 kg K ha-1), em condição de casa de vegetação. Aos 100 dias após o transplantio, as plantas foram colhidas para determinar as características de crescimento: altura, diâmetro, matéria seca da parte aérea e raízes e a concentração de nutrientes presentes na parte aérea e raízes. O desenvolvimento das mudas de mogno é pouco influenciado pelo fornecimento de doses crescentes dos nutrientes nitrogênio, fósforo e potássio, indicando uma baixa exigência nutricional da espécie na fase inicial de crescimento. Entre os nutrientes avaliados, a espécie parece ligeiramente mais exigente quanto ao potássio em relação aos demais. No entanto, a demanda da planta já seria satisfeita com uma pequena adição do respectivo nutriente. A adubação com nitrogênio e fósforo não promove melhora na qualidade das mudas de mogno.Palavras-chave: Espécies florestais; mogno; nutrição mineral; crescimento inicial. AbstractDevelopment of Swietenia macrophylla seedlings in response to nitrogen, phosphorus and potassium. A Greenhouse experiment was developed in order to investigate effects of nitrogen, phosphorus and potassium on the growth of mahogany seedlings (Swietenia macrophylla King). The plants were cultured in clayey dystrophic Red Latosol containing six nitrogen levels (0, 50, 100, 125, 150 and 200 kg N ha-1), six phosphorus levels (0, 75, 150, 225, 300 and 400 kg P2O5 ha-1) and six potassium levels (0, 40, 80, 120, 160 and 200 kg K ha-1). After 100 days of transplanting, the plants were harvest and processed for determine height, diameter, dry weight and nutrient concentration in roots and shoots. Addition of nitrogen, phosphorus and potassium did not affect the mahogany seedlings development. In contrast to N and P, the yield of plants was slightly greater with K fertilization. In general, results of this study clearly demonstrate the absence of a beneficial effect of these nutrients on the growth of mahogany seedlings. The nitrogen and phosphorus did not improve the quality of mahogany seedlings.Keywords: Forest species; mahogany; mineral nutrition; early growth.

scholarly journals Physico-chemical characterisation and fertility rating of maize growing soils from hilly zone of Shivamogga district, Karnataka

2018 ◽  
Author(s):  
K. S. Niranjana ◽  
K. Yogendra ◽  
K. M. Mahadevan
Keyword(s):  
Nutrient Management ◽  
Sandy Loam ◽  
Available Nitrogen ◽  
High Productivity ◽  
Physico Chemical ◽  
Copper Zinc ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Representative Samples ◽  
Iron And Manganese

Physico-chemical characterisation and fertility rating of surface soils (0-15 cm) was studied in 130 representative samples of different locations from maize growing areas from hilly zone of Shivamoga district of Karnataka.The soils were sandy loam to sandy clay loam in texture with bulk density varying from 1.43 to 1.49 Mg m-3. The study revealed that the majority of the soils were medium to highly acidic with non-saline nature and high in organic carbon status. The available nitrogen, phosphorus and potassium were low in fertility status. The exchangeable calcium and magnesium contents were marginal to adequate and varied from 2.10 to 6.90 cmol (p+) kg-1 and 0.50 to 3.30 cmol (p+) kg-1, respectively. The available sulphur ranged from 6.25 to 24.86 ppm. The soils were comparatively low to high in iron and manganese contents and were low in copper,zinc and boron contents. Hence, the nutrient management of maize growing soils plays an important role in maintaining the soil fertility and high productivity in hilly zone of Karnataka.

scholarly journals Nitrogen, Phosphorus, and Potassium Effects on Seeded Buffalograss Establishment

HortScience ◽  
2002 ◽  
Vol 37 (2) ◽  
pp. 371-373 ◽  
Author(s):  
Kevin W. Frank ◽  
Roch E. Gaussoin ◽  
Jack D. Fry ◽  
Michael D. Frost ◽  
James H. Baird
Keyword(s):  
Field Studies ◽  
Buchloe Dactyloides ◽  
Total N ◽  
Metsulfuron Methyl ◽  
Potassium Application ◽  
Phosphorus And Potassium ◽  
N Rates ◽  
Nitrogen Phosphorus ◽  
Establishment Rate

Field studies were conducted in Kansas, Nebraska, and Oklahoma in 1996 to evaluate the influence of nitrogen (N), phosphorus (P), and potassium (K) applied alone or in combination on the establishment rate of buffalograss [Buchloe dactyloides (Nutt.) Engelm.] from seed. `Cody' buffalograss burrs were planted at 98 kg·ha-1. Nitrogen was applied at 0 or 49 kg·ha-1 at planting and at 49 kg·ha-1 weekly or every other week for 5 weeks after seeding (WAS). The total N amounts applied were 0, 49, 147, or 294 kg·ha-1. Phosphorus and K were applied at rates of 0 or 49 kg·ha-1 at planting only. Percent buffalograss coverage ratings were taken weekly for up to 11 WAS. Buffalograss coverage was enhanced by N rates up to 147 kg·ha-1. Application of P improved buffalograss establishment at the Nebraska and Oklahoma sites but had no effect at the Kansas site. Potassium application had no influence on establishment at any site. Chemical names used: methyl 2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)-amino]carbonyl]amino] sulfonyl]benzoate (metsulfuron methyl); 6-chloro-N,Ń-diethyl-1,3,5-triazine-2,4-diamine (simazine)

WEEDS IN POTATO CULTURE AND THEIR OUTCOME IN SPREADING OF Alternaria spp.

2018 ◽  
Vol 17 (6) ◽  
pp. 159-166
Author(s):  
Halina Kurzawińska ◽  
Stanisław Mazur ◽  
Małgorzata Nadziakiewicz ◽  
Jacek Nawrocki
Keyword(s):  
Chenopodium Album ◽  
Potato Cultivar ◽  
Cirsium Arvense ◽  
Potato Plants ◽  
Potato Culture ◽  
Rapd Pcr ◽  
Microscopic Features ◽  
Weed Infestation ◽  
Pcr Method ◽  
Potato Crops

The aim of this study was to determine whether the weeds accompanying potato crops can be a source of Alternaria spp. causing Alternaria leaf blight and to determine the genetic similarities of Alternaria alternata isolates infecting selected weeds: Chenopodium album, Cirsium arvense and tested potato cultivar. Three-year field experiment was conducted on the potato cultivar ‘Vineta N’. The isolates were classified into different species on the basis of macro- and microscopic features. In each year of the study, A. alternata dominated among the isolated fungi colonizing the leaves of potato plants and the selected weeds. The genetic similarities of A. alternata isolates was determined by the RAPD-PCR method. Tested genetic forms of A. alternata were closely related; only small differences in the pattern of the separated amplification products was evidenced. The dominance of A. alternata on the weeds accompanying potato crops suggests that if weed infestation is extensive, the pathogen is very likely to spread and its population to increase.

Effects of Water-Nitrogen Interaction on Absorption, Translocation and Distribution of Nitrogen, Phosphorus, and Potassium in Rice

2010 ◽  
Vol 36 (4) ◽  
pp. 655-664 ◽  
Author(s):  
Yong-Jian SUN ◽  
Yuan-Yuan SUN ◽  
Xu-Yi LI ◽  
Rong-Ping ZHANG ◽  
Xiang GUO ◽  
...  
Keyword(s):  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

scholarly journals Effects of serpentinite fertilizer on the chemical properties and enzyme activity of young spruce soils

2016 ◽  
Vol 30 (4) ◽  
pp. 401-414 ◽  
Author(s):  
Ewa Błońska ◽  
Kazimierz Januszek ◽  
Stanisław Małek ◽  
Tomasz Wanic
Keyword(s):  
Enzyme Activity ◽  
Chemical Properties ◽  
Molar Ratio ◽  
Tree Roots ◽  
Forest Zone ◽  
Negative Effect ◽  
Phosphorus And Potassium ◽  
One Year ◽  
Nitrogen Phosphorus ◽  
Experimental Plots

AbstractThe experimental plots used in the study were located in the middle forest zone (elevation: 900-950 m a.s.l.) on two nappes of the flysch Carpathians in southern Poland. The aim of this study was to assess the effects of serpentinite in combination with nitrogen, phosphorus, and potassium fertilizers on selected chemical properties of the soil and activity of dehydrogenase and urease in the studied soils. All fertilizer treatments significantly enriched the tested soils in magnesium. The use of serpentinite as a fertilizer reduced the molar ratio of exchangeable calcium to magnesium, which facilitated the uptake of magnesium by tree roots due to competition between calcium and magnesium. After one year of fertilization on the Wisła experimental plot, the pH of the Ofh horizon increased, while the pH of the mineral horizons significantly decreased. Enrichment of serpentinite with nitrogen, phosphorus, and potassium fertilizers stimulated the dehydrogenase activity in the studied organic horizon. The lack of a negative effect of the serpentinite fertilizer on enzyme activity in the spruce stand soil showed that the concentrations of the heavy metals added to the soil were not high enough to be toxic and indicated the feasibility of using this fertilizer in forestry.

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