The causes of the lack of self-tolerance of winter rye, grown on light sandy soils. 1. Influences of foot rots and nematodes.

Abstract

In an 18-yr rotational experiment on a light sandy soil, rye, grown after rye, showed a depression in grain yield of 30% and in straw yield of 10%, compared to rye following other crops (oats, maize, potatoes or rape). Investigation into the causes of this reduction in yield made it highly probable that neither nematodes nor foot-rot fungi were the main causes. Rye grown after rye seems to take up less N from the soil than in any other sequence. ADDITIONAL ABSTRACT: In an 18-year rotational experiment on a light sandy soil in the Netherlands, yields of seed and of straw from rye following rye were reduced by 30% and 10% respectively, compared with yields from rye following other crops. Investigation showed that it is highly improbable that either nematodes or foot rot fungi are the causes. (Abstract retrieved from CAB Abstracts by CABI’s permission)

The causes of the lack of self-tolerance of winter rye grown on light sandy soils. 3. Effects of soil funghi

“…In an earlier rotational field experiment laid out on a light sandy oil, winter rye ap peared to be self-intolerant (Schölte & Kupers, 1977). This self-intolerance of win ter rye is also found by Steinbrenner et al (1982) and Obenauf et al (1982).…”

“…A series of field and pot experiments indicated that neither foot rot, nematodes nor Phytotoxins could be important causes of this lack of self-tolerance (Schölte & Kupers, 1977, 1978. At the same time it became clear that the main cause ought to be found in the soil microflora.…”

The causes of the lack of self-tolerance of winter rye, grown on light sandy soils. 2. Influences of phytotoxins and soil microflora.

“…In a rotational experiment on a light sandy soil, conducted between 1952 and 1970, it was found that winter rye is a self-intolerant crop (Schölte and Kupers, 1977). Averaged over the whole period the seed yield was more than 30 % lower on the plots where rye was grown following rye compared to the yield of those plots where rye was grown after all other preceding crops in this field experiment.…”