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Medientyp:
E-Artikel
Titel:
Edaphic Responses of Lupinus Texensis and Lupinus Subcarnosus
Beteiligte:
Nixon, Elray S.
Erschienen:
Duke University Press, 1964
Erschienen in:Ecology
Sprache:
Englisch
ISSN:
0012-9658;
1939-9170
Entstehung:
Anmerkungen:
Beschreibung:
<p>Lupinus texensis Hook, is widely distributed over a number of soils while L. subcarnosus Hook. is restricted to two sandy strips in south-central Texas. Transplants and seeds from certain soil types were grown on both indigenous (granitic sandy loam, limestone clay loam, Blackland Prairie silty clay loam, Bastrop Park sandy loam, and a South Strop sandy loam) and non-indigenous (serpentine sandy clay loam, Lufkin pinewoods sandy loam, and a Bastrop pinewoods sand) soils. Nutrients were added to certain soils, and plants of both species were grown in an inert perlite medium under various levels of calcium, nitrogen, and phosphorous. L. texensis transplants flowered and produced pods on all of the soil types, but the plants grown from seed varied with the soil. Specific edaphic selectivity of plants for their native soils was not detected. Growth was subnormal on serpentine and Lufkin pinewoods soils. L. subcarnosus transplants and plants grown from seed grew well on the Bastrop sand and sandy loam soils but showed inhibited growth on the limestone, Blackbird Prairie, serpentine, granitic, and Lufkin pinewoods soils. Plants grown on the limestone soil developed a lethal chlorosis. Vigor of both species on serpentine soil was increased by calcium and nitrogen treatments, and L. subcarnosus plants responded to nitrogen treatments when grown on the granitic soil. L. texensis and L. subcarnosus plants grown on the Lufkin pinewoods soil did not respond to nutrient treatments. Chelated iron additions corrected chlorotic effects induced by the limestone and Blackland Prairie soils but did not bring about normal growth. Maximum average production for both species occurred at about 50 ppm for calcium, about 105 ppm for nitrogen, and at 5-10 ppm for phosphorus. L. texensis apparently has a wide edaphic tolerance range with only the serpentine and Lufkin soils presenting barriers to its migration, while the distribution of L. subcarnosus appears to be primarily edaphically controlled by contiguous calcereous and east Texas pinewoods soils.</p>