Die rol wat nitraat: ammoniumverhoudings speel in die effektiewe benutting van stikstof by <i>Zea mays</i> L.

Adriaanse, F. G.; Human, J. J.

doi:10.1080/02571862.1986.10634189

Cited by 15 publications

(8 citation statements)

References 10 publications

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“…In nutrient solution culture, Adriaanse and Human (1986) determined that the best ratio for effective N utilization in maize, as assessed by grain yield per unit of N in leaves and stem, was obtained at a NO 3 -: NH 4 + ratio of 3:1. Botha and Pretorius (1991) reported that about 67% of applied N 15 was recovered by wheat plants, irrespective of the form of N (NO 3 -or NH 4 + ) applied to the plants.…”

Section: Mineral Nutritionmentioning

confidence: 99%

Crop physiology: A perspective for southern Africa

Modi

Greenfield

2010

South African Journal of Plant and Soil

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Crop physiology is a broad subject and a comprehensive treatise of all its aspects is impossible, even in a whole volume dedicated to the subject. With a few exceptions, plant physiology, rather than crop physiology, is commonly the focus when physiological aspects of plant growth and development are reviewed in biological sciences. Plant and crop physiology are distinguishable by the manner in which one is almost purely basic and the other tends towards application of the science in crop management. Therefore, the objective of this review was to highlight crop production-oriented physiological research that has shaped our current knowledge and research activities in the past few decades, especially the latter part of the past century. Source-sink relationships, stress physiology, mineral nutrition and seed physiology were identified as the key aspects of crop physiology that influence crop production. Each of these aspects is addressed to identify its significance in crop performance and to highlight both the breakthroughs and gaps in our contemporary knowledge of crop physiology. There was no attempt to provide fundamental interpretations. The reader is referred to relevant appraisals of crop and plant physiology, to gain further insight into original data. Since the review is also meant to contribute to further education in crop production, views on the challenge of training future crop scientists are expressed in the final section.

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Section: Mineral Nutritionmentioning

confidence: 99%

Crop physiology: A perspective for southern Africa

Modi

Greenfield

2010

South African Journal of Plant and Soil

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“…Nitraat is in die algemeen egter die dominante bron van stikstofvoeding vir gewasse; omdat dit as gevolg van nitrifikasie in hoer konsentrasies as NH4 + in bewerkte gronde voorkom (Hageman, 1984). Gewasse het voorkeure ten opsigte van NH4 + en N0 3 ', terwyl kombinasies van NH4 + en N0 3 ' beter groei en produksie by sommige gewasse veroorsaak (Adriaanse & Human, 1986).…”

Section: Inleidingunclassified

Kinetika van nitrifikasie in gronde van die sentrale besproeiingsgebiede in Suid-Afrika

Laubscher¹,

Preez²

1989

South African Journal of Plant and Soil

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“…Adriaanse & Human (1986) het die optimum nitraat:ammoniumverhouding vir saadproduksie by mielies as on?eveer 3:1 by 100 mg N 1-1 en ongeveer 1:0 by 400 mg N 1-bepaal. Schrader, Domska, lung & Peterson (1972) het gevind dat die optimum nitraat:ammoniumverhouding vir droemassaproduksie by mielies wissel tussen 1:3 en 3:1.…”

Section: • Aan Wie Korrespondensie Gerig Moet Wordunclassified

“…Die glashuis-sandkultuur wat deur Adriaanse & Human (1986) ontwikkel en beskryf is, is gebruik. Dieselfde konsentrasies van noodsaaklike voedingselemente in die voedingsoplossings is gebruik soos deur hulle beskryf.…”

Section: Materiaal En Metodesunclassified

“…Tabel 3 Die invloed van stikstofkonsentrasie en N0 3 -:NH 4 + -verhouding op dae tot blom N0 3 --N:NH 4 +-N-verhouding Tabel 4 Stikstoftoename van die stamme ,tydens die graanvulperiode 1'10 3 --N:NH4 + -N-verhoudingAdriaanse & Human (1986) vir hierdie verhouding in vergelyking met 'n 1:0-verhouding aangetoon het. Daar bestaan dus moontlik 'n verband tussen Ntranslokasieverlies uit die blare, graanopbrengs en NH4 +-reaksie.Dank is verskuldig aan die Departement van Landbou en Watervoorsiening vir finansiering, dr B.E.…”

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