INITIAL GROWTH OF Araucaria angustifolia ROOTSTOCK IN RESPONSE TO FERTILIZATION WITH NITROGEN, PHOSPHORUS AND POTASSIUM

Abstract Currently, water scarcity, especially in irrigated agriculture, has led researchers to study reuse to study industrial and sewage reuse. Landfill leachates deserve special attention due to its difficulty of tratment they are effluents that are difficult to treat and because it contains essential susbstances for plant nutrition, such as nitrogen, phosphorus and potassium and its application in agriculture can be considered a noble use if it is properly handled and does not cause phytotoxicity. This study investigated the effects of different dilutions of treated and non-treated landfill leachate on germination and vitality of sunflower seed (cv. BRS 321), its effects in growth,and vitality and soil atributes under sunflower culture in greenhouse. The leachate was treated by two electro-Fenton process or distillation. The results showed that sunflower cv. BRS 321 seeds, germinated vigorously up to 25% effluent dilution, showing resistance to salinity and phytotoxicity at 50% raw leachate dilution. 15% dillution showed satisfactory results in sunflower growth and nutrition. However the leachate use of higher concentrations showed some changes in soil characteristics. This study suggests that landfill leachate can be used in seed germination under proper use and application, in their lowest leachate concentrations and always based on the chemical analyzes of the leachate.

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

ACTA AGRONOMICA SINICA ◽

10.3724/sp.j.1006.2010.00655 ◽

2010 ◽

Vol 36 (4) ◽

pp. 655-664 ◽

Cited By ~ 6

Author(s):

Yong-Jian SUN ◽

Yuan-Yuan SUN ◽

Xu-Yi LI ◽

Rong-Ping ZHANG ◽

Xiang GUO ◽

...

Keyword(s):

Phosphorus And Potassium ◽

Nitrogen Phosphorus

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Absorption and Distribution of Nitrogen,Phosphorus and Potassium inScutellaria baicalensisGeorgi and Their Relationships to Dry Matter Accumulation

Plant Science Journal ◽

10.3724/sp.j.1142.2012.10079 ◽

2012 ◽

Vol 30 (1) ◽

pp. 79 ◽

Cited By ~ 1

Author(s):

Xian-Yan CAO ◽

Wei-Ling WANG ◽

Fu-Li XU ◽

Jing WANG ◽

Xiao-Hu ZHANG

Keyword(s):

Dry Matter ◽

Dry Matter Accumulation ◽

Phosphorus And Potassium ◽

Nitrogen Phosphorus

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

International Agrophysics ◽

10.1515/intag-2016-0015 ◽

2016 ◽

Vol 30 (4) ◽

pp. 401-414 ◽

Cited By ~ 2

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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Effects of nitrogen, phosphorus and potassium rates on Microdochium patch

itsrj ◽

10.1002/its2.28 ◽

2021 ◽

Author(s):

Brian McDonald ◽

Alec Kowalewski ◽

Clint Mattox ◽

Emily Braithwaite ◽

Charles Schmid

Keyword(s):

Phosphorus And Potassium ◽

Nitrogen Phosphorus

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Phytotoxic effects of invasive Ageratina adenophora on two native subtropical shrubs in Nepal

Scientific Reports ◽

10.1038/s41598-021-92791-y ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Tej Bahadur Darji ◽

Barsha Adhikari ◽

Seeta Pathak ◽

Shristi Neupane ◽

Lal B. Thapa ◽

...

Keyword(s):

Low Ph ◽

Potential Mechanism ◽

Phytotoxic Effects ◽

Seedling Length ◽

Ageratina Adenophora ◽

Ir Analysis ◽

Allelopathic Interference ◽

Phosphorus And Potassium ◽

Native Shrubs ◽

Nitrogen Phosphorus

AbstractThe response of native plants to allelopathic interference of invasive species may differ from species to species. In this study, the phytotoxic effects of Ageratina adenophora were tested on two native shrubs (Osbeckia stellata and Elsholtzia blanda) of Nepal. Both the shrubs were grown in pots under treatments of A. adenophora fresh leaves and root leachates, and litter. Then, the seedling length and biomass were compared among the treatments. The results show that A. adenophora litter has stimulatory effects but the leachates from fresh leaves and root are phytotoxic to the growth and development of native shrubs. Infrared Spectroscopy (IR) analysis confirmed the presence of O–H (Hydroxyl), N–H (Amines), C≡C (Alkynes), and C–H stretching (Aromatic) or C–O–C stretching (Ethers) in the leachates representing harmful allelochemicals. The invaded soil by A. adenophora had low pH and a high amount of organic matter, total nitrogen, phosphorus, and potassium than the uninvaded soil. The results indicate that the native O. stellata and E. blanda are harmed by A. adenophora in nature by leaching of allelochemicals and probably by reducing the soil pH. Overall, this study has provided valuable insights regarding the effects of A. adenophora invasion on native shrubs and revealing the potential mechanism of its invasiveness.

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