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11. |
Evaluering van braakstelsels vir droëlandkoringverbouing in die Oranje-Vrystaat |
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South African Journal of Plant and Soil,
Volume 3,
Issue 4,
1986,
Page 198-200
EngelbrechtC.,
der WesthuizenA.J.,
JoubertG.D.,
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摘要:
Drie produksiestelsels vir droëlandkoring is te Glen en Bethlehem geëvalueer. Die kortbraak was vyf tot ses maande, intermediêre-braak was 12 tot 13 maande en langbraak was 17 maande. Glen verteenwoordig 'n semi-ariede somerreëngebied waar die proefgrond 'n plantbeskikbare-waterstoorkapasiteit van 148 mm water per 1 200 mm diepte het. Hier het die behandelings met langer braakperiodes 'n betekenisvol hoër graanopbrengs en hektolltermassa van koring tot gevolg gehad in vergelyking met die kortbraakbehandeling. Hierdie neiging word toegeskryf aan die groter hoeveelheid grondwater wat in die braakperiode gestoor is by die langer braakbehandelings. Bethlehem word gekenmerk deur gunstiger klimaatstoestande vir droëland-koringproduksie as Glen. Die Bethlehem-grond se plantbeskikbare waterstoorkapasiteit is egter laer, naamlik 125 mm in die 600 mm beskikbare profieldiepte. Onder die meer gunstige klimaatstoestande in die braak- en groeiseisoene van koring te Bethlehem was die opbrengsverskille tussen die behandelings nie statisties betekenisvol nie.
ISSN:0257-1862
DOI:10.1080/02571862.1986.10634222
出版商:Taylor&Francis Group
年代:1986
数据来源: Taylor
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12. |
Alachlor-geïhduseerde veranderinge in sekere membrane vanSorghum bicolor(L.) Moench-plante |
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South African Journal of Plant and Soil,
Volume 3,
Issue 4,
1986,
Page 200-203
ReinhardtC.F.,
NelP.C.,
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摘要:
Sekere ultrastrukturele veranderinge veroorsaak deur alachlor (α-chloor-2′, 6′-diëtiel-N-metoksimetielasetanilied) in graansorghumplante is ondersoek. Elektronmikro- skoopmikrograwe het aangetoon dat disintegrering van vakuoolmembrane, kernmembrane en omhullingsmembrane van chloroplaste voorgekom het by alachlorbehandelde plante.
ISSN:0257-1862
DOI:10.1080/02571862.1986.10634223
出版商:Taylor&Francis Group
年代:1986
数据来源: Taylor
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13. |
An evaluation of rootstocks for apricots on sandy soil |
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South African Journal of Plant and Soil,
Volume 3,
Issue 4,
1986,
Page 203-205
StadlerJ.D.,
StassenP.J.C.,
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摘要:
The nematode-resistant rootstocks Okinawa and Nemaguard yielded better than all other rootstocks for Royal on sandy soil. Bulida performed best on apricot seedling rootstock followed by Okinawa.Prunus mumedid not appear promising for either Royal or Bulida. Both Royal and Bulida developed into small trees with low yield capacity when grown on Myrobalan B rootslock.
ISSN:0257-1862
DOI:10.1080/02571862.1986.10634224
出版商:Taylor&Francis Group
年代:1986
数据来源: Taylor
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14. |
Relationship between DIMBOA content and atrazine tolerance in maize |
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South African Journal of Plant and Soil,
Volume 3,
Issue 4,
1986,
Page 205-207
MalanC.,
le Court de BillotM.R.,
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摘要:
Data of two independent studies are presented to illustrate the relationship between DIMBOA content of maize inbreds and their tolerance to atrazine. Polynomial regression curves best described this relationship. R-squared values of 0,48 and 0,87 between DIMBOA content and tolerance were obtained when atrazine was applied at 3 and 6 ppm v/v respectively.
ISSN:0257-1862
DOI:10.1080/02571862.1986.10634225
出版商:Taylor&Francis Group
年代:1986
数据来源: Taylor
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