Sweet Corn Plant Responses to P and K in the Soil and to Band-applied Monoammonium Phosphate, Potassium Sulfate, and Magnesium Sulfate
Year: 1989
Type: article
Abstract: Responses of sweet corn plants ( Zea mays L. var. rugosa cv. Jubilee) to levels of residual P and K in a fine sandy loam soil from previous broadcast applications of concentrated superphosphate (CSP) and potassium chloride (KCI) and to band-applied monoammonium phosphate (MAP), potassium sulfate (K 2 SO 4 ), and magnesium sulfate (MgSO 4 ) at planting were studied. Fourteen years after no applications of broadcast CSP or KCI fertilizers, responses of sweet corn plants to levels of residual P were greater than to residual K in the soil. Increasing the level of residual P in the soil increased dry weight per seedling from 1.5 to 7.7 g, fresh weight per ear from 278 to 358 g, the concentration of P from 2.9 to 4.6 mg·g −1 dry weight, but decreased K, Ca, and Zn in the leaves. Increasing the level of residual K in the soil did not affect the dry weight of the seedlings or the fresh weight of the ears, but increased the concentration of K from 16.7 to 28.1 mg·g −1 dry weight and decreased Ca and Mg in the leaves. Banded MAP, especially at low levels of residual P in the soil, increased the dry weight of the seedlings and the fresh weight of the ears. Banded K 2 SO 4 did not affect the weight of the seedlings or ears, but increased the concentration of K and decreased Ca and, especially, Mg in the leaves. Banded MgSO 4 , with or without high residual K in the soil and/or banded K 2 SO 4 , did not affect weight of the seedlings or ears, but decreased the concentration of K and increased Mg in the leaves of the sweet corn plants.
Authors: Nathan H. Peck, George E. MacDonald
Institution: Cornell University
Language: English
Subfield: Soil Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: hybrid
Estimated APC paid: $3,500
OpenAlex ID: W2792621093