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  • Author or Editor: R. P. Covey Jr. x
  • HortScience x
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Abstract

Zinc fertilization (5 ppm) of apple seedlings (Malus sp.) grown in chloropicrin-fumigated soil increased shoot weight slightly and Zn concentration significantly after 70 days. Inoculation of seedling with vesicular-arbuscular mycorrhizal fungus Glomus mosseae (Nicol. & Gerd.) Gerd. & Trappe, or G. fasciculatus (Thaxter) Gerd. & Trappe without Zn fertilization increased shoot weight but not plant Zn concentration. Zinc fertilization plus mycorrhizal inoculation increased shoot weight and Zn concentration. Total Zn uptake was increased 7 fold by combined Zn fertilization and G. fasciculatus inoculation. G. mosseae was slightly less effective than G. fasciculatus in promoting seedling growth.

Open Access

Abstract

Growth of seedlings of apple (Malus sp.) and pear (Pyrus sp.) was significantly greater in 14 out of 19 chloropicrin-fumigated-pear sous as compared to the nonfumigated check soils. Increase in seedling growth in the 14 soils varied from 50% to more than 400% with both apple and pear. The lack of response of pear and apple seedlings to soil fumigation in 5 soils may be due to low soil pH, high soil arsenic levels and high soil phosphorous fixing capacity. Counts of plant parasitic nematodes (primarily Pratylenchus spp.) were generally low in all but one soil.

Open Access