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

EFFECTS OF NITROGEN, PHOSPHORUS AND POTASSIUM ON YIELD AND MATURITY OF CAULIFLOWER

1976 ◽  
Vol 56 (1) ◽  
pp. 127-131 ◽  
Author(s):  
J. A. CUTCLIFFE ◽  
D. C. MUNRO
Keyword(s):  
Brassica Oleracea ◽  
Nitrogen And Phosphorus ◽  
Phosphorus And Potassium ◽  
Cropping Seasons ◽  
Nitrogen Phosphorus ◽  
Brassica Oleracea L

The effects of nitrogen, phosphorus, and potassium on the yield and maturity of cauliflower (Brassica oleracea L. ssp. botrytis cv. Snowball Y) were investigated at a total of nine locations during three successive cropping seasons. Yields were substantially increased at most locations by applications of nitrogen and phosphorus but were only slightly affected by applied potassium. Maturity was slightly delayed by a lack of phosphorus. Maximum yields were generally obtained where N was applied at 112–224 kg/ha, P at 49–98 kg/ha, and K at 93 kg/ha.

EFFECTS OF NITROGEN, PHOSPHORUS, AND POTASSIUM ON RUTABAGA YIELDS

1973 ◽  
Vol 53 (2) ◽  
pp. 357-361 ◽  
Author(s):  
J. A. CUTCLIFFE ◽  
D. C. MUNRO
Keyword(s):  
Nitrogen And Phosphorus ◽  
Soil P ◽  
Phosphorus And Potassium ◽  
Cropping Seasons ◽  
Nitrogen Phosphorus

The effects of nitrogen, phosphorus, and potassium on the yield and shape of rutabagas (Brassica napobrassica Mill., cult York) were investigated at three locations each year during three successive cropping seasons. Total and marketable yields were increased at most locations by applications of nitrogen and phosphorus, but applied potassium increased yields at only three locations. For maximum yields, rates of 90–112 kg/ha of N and 49–130 kg/ha of P were necessary. Where soil P levels were low, yield increases from applied N were obtained only when accompanied by adequate phosphorus. The ratio of the equatorial/polar diameters of the roots was increased by added N, and to a lesser extent, by applied P and K.

scholarly journals Statistical comparison of soil analysing results of chernozem soils

2008 ◽  
pp. 93-99
Author(s):  
Róbert Víg ◽  
Attila Dobos ◽  
Zoltán Pongrácz
Keyword(s):  
Zinc Content ◽  
Soil Samples ◽  
Soil Types ◽  
Chernozem Soil ◽  
Nitrogen And Phosphorus ◽  
Soil Plasticity ◽  
The Difference ◽  
Phosphorus And Potassium ◽  
Precision Fertilization ◽  
Nitrogen Phosphorus

The soil fertility was degraded as a result of unreasonable tillage, therefore the application of site-specific nutrient replacement is necessary. It is essential for the application of precision fertilization to know the location, extension, soil properties and nutrient-supply of the different soil types ofcultivated areas.We collected soil samples from 580 hectares of land in 2006. Soil samples were collected from every 5 ha in 30 and 60 cm depths during Spring from 20.05.2006 to 12.06.2006 and again in Autumn from 09.19.2006 to 02.10.2006. Soil samples were analysed at the Department of Agricultural Chemistry and Soil Science of DE-ATC.The two examined soils are slightly calcareous, weakly saline, poor in zinc. The calcareous chernozem soil is slightly acid, the content of humus, nitrogen, phosphorus and potassium is medium in this soil. The meadow chernozem soil is slightly alkaline, and properly supplied with humus and potassium, and middling supplied with nitrogen and phosphorus. The meadow chernozem soil is more heterogenous in soil plasticity, lime, saline, nitrogen phosphorus and potassium content and less heterogenous in pH and zinc content than the calcareous chernozem soil.Standard deviation of measured values in pH, soil plasticity, humus and nitrogen content significantly differ between the examined soil types. The soil plasticity, pH, humus, nitrogen and zinc content significantly differ among calcareous chernozem soil and meadow chernozem soil, but the difference in phosphorus content can be statistically proven only in case of Spring soil sampling.

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.

Litterfall and nutrient cycling in four Hawaiian montane rainforests

1995 ◽  
Vol 11 (2) ◽  
pp. 189-203 ◽  
Author(s):  
Peter M. Vitousek ◽  
Grant Gerrish ◽  
Douglas R. Turner ◽  
Lawrence R. Walker ◽  
Dieter Mueller-Dombois
Keyword(s):  
Nitrogen Concentration ◽  
Parent Material ◽  
Nutrient Concentrations ◽  
Nitrogen And Phosphorus ◽  
Mauna Loa ◽  
Tree Ferns ◽  
Material Texture ◽  
Phosphorus And Potassium ◽  
Substrate Age ◽  
Nitrogen Phosphorus

ABSTRACTThe mass of fine litterfall and nutrient circulation through litterfall were determined in four Melrosideros polymorpha/Cibotium spp.-dominated rainforests that differed in substrate age, parent material texture and annual precipitation on Kilauea and Mauna Loa volcanoes on the island of Hawaii. Three of the sites had rates of litterfall of 5.2 Mg ha−1 y−1; the fourth, which was on the most fertile soil, produced 7.0 Mg ha−1 y−1 of litterfall with higher concentrations of nitrogen and phosphorus. Tree ferns of the genus Cibotium cycled relatively large amounts of nitrogen, phosphorus and potassium through litterfall; their contribution to nutrient circulation was disproportionate to their mass in the forest, or in litterfall. The forest on the youngest substrate, which also had the lowest concentrations of nitrogen in litterfall, was fertilized with complete factorial combinations of nitrogen, phosphorus and a treatment consisting of all other plant nutrients. Additions of nitrogen increased the quantity and nitrogen concentration in litterfall during the second year following the initiation of fertilization, while no other treatment had a significant effect. Additions of nitrogen had no effect on litterfall mass or nutrient concentrations in the most nutrient-rich site.

A comparison of the fine root component of a pure and a mixed coniferous stand

1988 ◽  
Vol 18 (11) ◽  
pp. 1416-1426 ◽  
Author(s):  
H. M. McKay ◽  
D. C. Malcolm
Keyword(s):  
Fine Roots ◽  
Standing Crop ◽  
Fine Root ◽  
Sitka Spruce ◽  
Nitrogen And Phosphorus ◽  
Mixed Stands ◽  
Method Of Calculation ◽  
The Mean ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Fine roots were sampled at monthly intervals during 1984–1985 in pure plots of Sitka spruce (Piceasitchensis (Bong.) Carr.) and mixed plots of Scots pine (Pinussylvestris L.) and Sitka spruce established on an upland heath in 1969. Both types of planting had received phosphorus and potassium fertiliser but no nitrogen. The mean standing crop of live roots (<2 mm diameter) in the top 5 cm of pure spruce plots was 112 g • m−2, almost double that of mixed stands (37 g • m−2 of spruce plus 20 g • m−2 of pine). Necromass was 80% of total mass in both stand types. Concentrations of nitrogen and phosphorus were greater in pure plots than in mixed plots, but fine root capital of nitrogen, phosphorus, and potassium was greater in pure spruce than in mixed plots (biomass and necromass contained 11, 2, and 5 and 45, 4, and 7 kg • ha−1 of nitrogen, phosphorus, and potassium, in pure plots, and 7, 1, and 3 and 30, 3, and 3 kg • ha−1 of nitrogen, phosphorus, and potassium in mixed plots, respectively). Production of fine roots in pure and mixed stands was estimated at 181 and 97 g • m−2•year−1 or 715 and 367 g • m−2•year−1, respectively, depending on the method of calculation. Fine roots of pure plots were highly concentrated in the top 3 cm. In mixture, spruce roots had a less extreme vertical distribution and pine roots were more evenly distributed down to 9 cm.

scholarly journals The Effects of Biopesticide and Fusarium oxysporum f.sp. vanillae on the Nutrient Content of Binucleate Rhizoctonia-Induced Vanilla Plant

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Haryuni Haryuni ◽  
Andre Fahriz Perdana Harahap ◽  
Supartini ◽  
Achmadi Priyatmojo ◽  
Misri Gozan
Keyword(s):  
Fusarium Oxysporum ◽  
Nutrient Content ◽  
Potassium Content ◽  
Nitrogen And Phosphorus ◽  
Randomized Design ◽  
Two Factors ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Plant Nutrient Content ◽  
Phosphorus Levels

Binucleate Rhizoctonia (BNR) fungi are essential for the germination of vanilla seeds. Chemical control of the soil-borne pathogen might adversely affect BNR. The purpose of this study is to determine the effect of Nicotiana tabacum extract biopesticides and Fusarium oxysporum f.sp. vanillae (Fusarium) on vanilla plant nutrient content induced by BNR. Materials and Methods. The research design was completely randomized design with two factors and three replications. The first factor was biopesticide (dosage of 0, 10, 20, and 30 ml/seedling), and the second factor was the application of Fusarium. Results. The increase in the nitrogen, phosphorus, and potassium content of vanilla was affected by biopesticides and Fusarium inoculation. Fusarium inoculation has no significant effect on nitrogen and phosphorus levels but significantly affects potassium levels. The biopesticide dosage is significant for nitrogen, phosphorus, and potassium. The interaction of biopesticides with Fusarium inoculation did not significantly affect the parameters of nitrogen and phosphorus content, but significantly affected potassium content. Conclusion. The application of biopesticides and Fusarium inoculation after induction of BNR can increase nitrogen, phosphorus, and potassium content of vanilla plants.

scholarly journals Effect of Fertilizer N, P, K, Ca, Mg, and Si on Tomato Yields in an Oxisol

1969 ◽  
Vol 59 (1) ◽  
pp. 26-34
Author(s):  
R. Abrams ◽  
L. Cruz-Pérez ◽  
R. Pietri-Oms ◽  
F. J. Juliá
Keyword(s):  
Nitrogen And Phosphorus ◽  
Tomato Cultivar ◽  
Yield Data ◽  
Tomato Production ◽  
The Poor ◽  
Phosphorus And Potassium ◽  
High Level ◽  
The Relationship ◽  
Nitrogen Phosphorus ◽  
Different Levels

The effect of different levels of N, P, and K with and without Ca, Mg and Si, was studied on tomato cultivar Floradel at the Isabela Experiment Substation. The results obtained revealed that 224 Kg N and P/ha appear to be adequate for tomato production in a Coto clay, an Oxisol. A fertilizer-yield equation was employed to describe the relationship between applications of nitrogen, phosphorus and potassium and the yield in metric tons/ha of marketable tomatoes, in an experiment conducted in the same soil. The equation fitted very well the yield data obtained with nitrogen and phosphorus, but not so well mth that obtained with potassium. The poor fit of the potassium equation may have been due to the high level of potassium in the soil.

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 Influence of fertilizers, minor elements, and soil ph on the growth and protein content of tropical kudzu

1969 ◽  
Vol 37 (1) ◽  
pp. 81-95
Author(s):  
Pablo Landrau, Jr. ◽  
George Samuels ◽  
P. Rodríguez
Keyword(s):  
Protein Content ◽  
Protein Production ◽  
Acid Soils ◽  
Minor Element ◽  
Low Fertility ◽  
Lime Treatment ◽  
Nitrogen And Phosphorus ◽  
Minor Elements ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

The effect of fertilizers and lime on the yield and protein production of tropical kudzu, as observed in the experiments here reported, is as follows: 1. In a greenhouse experiment, kudzu yields increased with increased pH on limed soils, with the highest yield at pH 7.5. 2. Nitrogen and phosphorus produced significant increases in the yield of green forage in a fertilizer experiment on a Río Piedras clay. No such increases were obtained with potash fertilizers. 3. Liming increased yields for the first cutting of kudzu only in a fertilizer- lime experiment on a heavy plastic Fajardo clay. Nitrogen was also of significant value in increasing forage yields and protein for the first cutting only. The second and third cuttings had no yield or protein increases that could be attributed to any fertilizer or lime treatment. 4. At Corozal, on a friable, acid Lares clay, kudzu did not respond to nitrogen, phosphorus, and potassium fertilizers. The response to liming was in protein content and then only in the second and third cuttings. 5. The use of nitrogen and lime is of value in establishing good productive stands of kudzu on very acid soils (pH below 5) of low fertility. 6. The effects of the use of borax and of magnesium oxide as minor-element fertilizers were negligible from the standpoint of yield and protein production.

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