عنوان

Direct and residual effects of lime on peanut performance on an acid soil of West Sumatra

Number

TLpq303909712

.Language of Text, Soundtrack etc

انگلیسی

Title Proper

Direct and residual effects of lime on peanut performance on an acid soil of West Sumatra

General Material Designation

[Thesis]

First Statement of Responsibility

L. I. Amien

Subsequent Statement of Responsibility

R. S. Yost

Name of Publisher, Distributor, etc.

University of Hawai'i at Manoa

Date of Publication, Distribution, etc.

1991

Specific Material Designation and Extent of Item

174

Dissertation or thesis details and type of degree

Ph.D.

Body granting the degree

University of Hawai'i at Manoa

Text preceding or following the note

1991

Text of Note

Acid soils comprise the majority of land available for expansion of peanut production in Indonesia. Field experiments were conducted to determine the effects of lime on peanut growth on an acid soil of West Sumatra. In the first experiment eight peanut cultivars were grown in plots with 0, 500, and 2000 kg lime/ha. Lime reduced Al saturation and increased peanut yields. Pelanduk and Rosa cultivars were the least sensitive to Al saturation and Banteng was the most. Tapir, Tupai, Florunner and Kelinci peanut cultivars were grown with six combinations of lime rate (0, 375 and 1000 kg/ha) and methods of application (surface broadcast, shallow and deeply incorporated). The plots received 375, 2350, and 6500 kg lime/ha 29 months earlier. Srondol and Danau Dibawah rice was planted after peanut, followed by Kelinci and Tapir. Lime increased soil pH, exchangeable Ca, Mg, and K but reduced extractable Al, P and SO4\sp{2-}. In about a year, the effects of lime extended to deeper soil layers. Roots contributed about 0.5 ton organic material/ha. Peanut yields increased with lime and higher rainfall. In the drier season peanut pod yields ranged from 240 kg/ha for Florunner at low lime at 1660 kg/ha for Kelinci with the high lime treatment. With higher rainfall, yields ranged from 800 kg/ha for Tapir to 1960 kg/ha for Kelinci. Critical Al saturation was approximately 22% for Florunner and Tapir cultivars, 35% for Kelinci and 46% for Tupai. The critical values increased to about 56% for Kelinci and Tapir in the higher rainfall season. Florunner and Tapir yield responded almost linearly to Ca saturation. Kelinci and Tupai maximum yields were obtained at Ca saturation of 75% and 56%, and 50% for both cultivars in the second crop. Peanut seedlings were grown in solution with low Ca and high Al at initial pHs 4 and 5. Root growth was enhanced by low-level Al but reduced by initial concentration of 15 muM Al at initial pH 4 and by 50 muM Al at initial pH 5.0 Ca additions were needed for root growth but requirements were low. Concentrations of 150 muM reduced the toxic effect of Al.

Agronomy

Biological sciences

L. I. Amien

R. S. Yost

Electronic name

p

[Thesis]

276903

a

Y