A tocombining double acute accentszám és a N-trágyázás közötti kölcsönhatás vizsgálata amaránt (Amaranthus spp.) növénnyel

Translated title of the contribution: Interaction between plant density and N fertilization in Amaranthus spp.

Research output: Contribution to journalArticle

Abstract

In an experiment set up on calcareous sandy soil at the RISSAC Experimental Station in Ocombining double acute accentrbottyán, the interaction between N fertilization and plant density was studied in terms of the development and yield of seed amaranth (variety Edit) and the element composition and element uptake of the plant organs. The plants were grown at densities of 57 or 246 thousand/ha, while the N fertilization rates were 0, 100, 200 and 300 kg N/ha. The 2×4 = 8 treatments were carried out in three replications, set up in strips arranged in a split-plot design on 24 May 1993. Twenty aboveground plant samples were taken on 16 August at panicle emergence and on 8 November at harvest for the purpose of plant analysis. In this dry year there was only 300 mm rainfall during the 5-month active growing period of amaranth, and this had a particularly serious effect on the generative phase. The following major conclusions could be drawn: - In this dry year the plant density did not have a significant influence on either the yield or the element composition of the plants. The maximum plant height (around 100 cm), seed yield (0.9 t/ha) and total aboveground yield (5.0 t/ha) were obtained in the 100 kg N/ha treatment. Higher N rates led to a drastic reduction in plant height, yield, leaf number per plant and shoot dry matter %. - The vegetative and generative organs of amaranth were on average 2-3 times richer in N, K, P, S and Cu than triticale plant organs grown on the same area. A similar accumulation of Fe, Al and Ba was also observed in the seed. Compared with triticale, the level of accumulation was 4-8 times for Mg, 5-9 times for Se and Sr, 5-15 times for Ca and 6-39 times for B. The seed of amaranth was able to accumulate an order of magnitude more Ca and B in the tissues than that of cereals under similar experimental conditions. Table 1. Effect of plant density and N fertilization on the development of seed amaranth at the beginning of flowering on 16 Aug. 1993 (Calcareous sandy soil, Ocombining double acute accentrbottyán). (1) Plant density, thousand plants/ha. a) Mean. (2) N fertilization, kg N/ha. (3) LSD5%. (4) Mean. Table 2. Effect of plant density and N fertilization on the air-dry yield of seed amaranth at harvest on 8 Nov. 1993 (Calcareous sandy soil, Ocombining double acute accentrbottyán). (1) Plant density, thousand plants/ha. a) Mean. (2) N fertilization, kg N/ha. (3) LSD5%. (4) Mean. Table 3. Effect of N supplies on the mean element composition of air-dry shoots of seed amaranth at the beginning of flowering on 16 Aug. 1993 (Calcareous sandy soil, Ocombining double acute accentrbottyán). (1) Element symbol and units. (1) Plant density, thousand plants/ha. a) Mean. (2) N fertilization, kg N/ha. (3) LSD 5%. (4) Mean. Note: The As, Cd, Co, Cr, Hg, Mo, Ni and Pb contents were generally below the 1 mg/kg detection limit. Plant density had no significant effect on the element composition. Table 4. Effect of N supplies on the element composition of the air-dry straw, husks and seed of seed amaranth at harvest on 8 Nov. 1993 (Calcareous sandy soil, Ocombining double acute accentrbottyán). (1) Element symbol and units. (2) Air-dry straw. (3) N fertilization, kg N/ha. (4) LSD5%. (5) Mean. (6) Air-dry husks. (7) Air-dry seed. Note: The As, Cd, Co, Cr, Hg, Mo and Pb contents were generally below the 1 mg/kg detection limit. Table 5. Mean composition of triticale in 1993 and the relative element accumulation of seed amaranth compared with triticale (Calcareous sandy soil, Ocombining double acute accentrbottyán) . (1) Element symbol and units. (2) Element composition of triticale. (3) Shoot. (4) Straw. (5) Seed. (6) Relative element accumulation in amaranth. Note: Shoots at the beginning of flowering, straw and seed at harvest. Relative element accumulation: ratio of amaranth/triticale element contents.

Translated title of the contributionInteraction between plant density and N fertilization in Amaranthus spp.
Original languageHungarian
Pages (from-to)69-78
Number of pages10
JournalAgrokemia es Talajtan
Volume57
Issue number1
DOIs
Publication statusPublished - Jun 1 2008

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Soil Science

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