DD292649A5 - METHOD FOR THE REGULATION OF UREA REMOVAL IN THE FUCKING AGRICULTURAL-GAERTNER BOEDEN WITH UREA-CONTAINING DUENGER - Google Patents

Abstract

Field of application is agriculture. The process according to the invention is characterized in that nickel-ions are fed to urea-containing substrates for the nutrition of higher plants or for the more effective N supply of microorganisms of the soil at rates of application of up to 80 g Ni / g.TM. Urea reduction; Fertilization; Agriculture; Nickel ions}

Description

Field of application of the invention

The invention relates to a method for regulating the degradation of urea in the fertilization of agricultural horticultural soil with urea-containing fertilizer.

Field of application of the invention are all areas of plant production within agriculture and horticulture.

Characteristic of the known state of the art

1. Some versions for fertilization with urea-containing substrates. Ammonia-urea solutions are currently a highly effective source of plant nitrogen supply. They are preferably used as foliar fertilizers in cereals at later stages of development. The fertilizer that has not been ingested by the plant can reach the groundwater unused with the rainwater. This process is undesirable. The still intact AHL solution is toxic and thus pollutes the environment.

2. Nickel is detected in almost all plants, especially as this heavy metal is readily taken up and translocated (MORTVEDT, J. J. and WL LINDSAY: Micronutrients in Agriculture - Publ. Soil Sei. Amer., Mad ^: son, Wise, USA 1972 MISHRA, D., and M. KAR: Nickel in Plant Growth and Metabolism, Bot. Rev. 1974, 395-452).

In 1975, it was shown that in Phaseolus beans Ni ^{2+ is} the heavy metal component of urease (POLACCO,

J. C: Is nickel a universal component of plant ureases? Plant Sei. Letters: 10 [19771,249-255].

Meanwhile, nickel is considered to be an essential microelement for higher plants (BROWN, H., RM WELCH, and EE CARY: Nickel -Arnicronutrient essential for Higher plants.) Plant Physiol. [1937] 85, 801-803 - BERGMANN, W. (ed .]: Nutritional disorders in crops, 2nd edition-VEB Gustav Fischer Vorlag, Jena 1988).

Object of the invention

The aim of the invention is to regulate the decomposition of urea in agricultural soils, in horticultural substrates, in hydroponics nutrient solutions and in other urea-containing media (eg, also in liquid manure).

Explanation of the essence of the invention

The object of the invention is to promote or to induce the activity of the urea-splitting urease so that the urea nitrogen is available to the plants at the desired time and the urea which pollutes the environment and enters the agricultural horticultural sector from different sources , is eliminated in calculable time.

According to the invention agricultural-horticultural soils in the fertilization with urea-containing fertilizer nickel ions in amounts up to 80Mg Ni / g TM added. It uses nickel compounds of any kind, which act as urease effectors. When using ammonia-urea solutions customary as long-term fertilizers, up to 10 μg of Ni / I are added; using all other forms of urea-containing fertilizer, 30-80 μg of Ni / g TM are added.

With the method according to the invention, the urease synthesis is promoted and sometimes even induced and thus the

Urea degradation regulated during fertilization.

Urease is found particularly in legumes, in lower concentrations in all other plants and also in microorganisms. After application of NiSO "yield increases were observed in legumes and cereals. By the method according to the invention, the urea nitrogen is plant available at the desired time. Another advantage of the method is that the toxic and polluting urea can be degraded in a calculable time. Subsequently, the invention will be explained in more detail by way of examples.

embodiment

Winter wheat of the variety "Alcedo" was treated on 10m ² plots with ammonia-urea solution (AHL as 2nd nitrogen dose, dose of the N-amount was based on the N-content of the stock) The AH-solution was 8,0g of nickel ( as nickel sulphate) per 5000I solution.Treatment took place on 15 June as foliar application harvested on 27 Aug. An increase of the grain yield by an average of 5-6% at a control level of 53.84 dt / ha was achieved.

Claims (3)

1. A method for regulating the degradation of urea in dor fertilization agricultural-horticultural soil with urea-containing fertilizer, characterized in that the urea-containing substrates nickel ions in amounts up to 80 pg Ni / g TM added. 2. The method according to claim 1, characterized in that one adds up to 1Ομο Ni / I in the use of customary as slow-release fertilizer ammonia-urea solutions (AHL). 3. The method according to claim 1, characterized in that when using all other forms of urea-containing fertilizer 30-80Mg Ni / g TM added.