4.7 Article

Interseeding Camelina and Rye in Soybean with Varying Maturity Provides Soil Cover without Affecting Soybean Yield

期刊

AGRONOMY-BASEL
卷 11, 期 2, 页码 -

出版社

MDPI
DOI: 10.3390/agronomy11020353

关键词

cover crop; canopy cover; wheat; winter survival

资金

  1. USDA-NIFA [2016-69004-24784]

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The study in the northern Plains of the USA found that interseeding winter rye into soybean resulted in higher yields compared to interseeding winter camelina. Early-maturing soybean cultivars were better suited for interseeding cover crops, but further optimization of interseeding systems is needed.
Low adoption to utilize cover crops interseeded into soybean (Glycine max (L.) Merr.), in the northern Plains in the USA, is due to a short growing season and a few adapted winter-hardy species. The objective was to evaluate the impact of interseeded winter camelina (Camelina sativa (L.) Crantz) and winter rye (Secale cereale L.) using different soybean relative maturities on soybean yield, canopy coverage, spring cover crop biomass, and subsequent wheat (Triticum aestivum L.) yield. Cover crops interseeded into early-maturing (0.4-0.8) soybean cultivars had more fall coverage compared with the 0.9 maturity cultivar, but the spring biomass was similar for all maturities. The soybean yield of the 0.9 cultivar was significantly higher, 2365 kg ha(-1) compared with 2037 kg ha(-1) for the 0.4 cultivar. Rye outperformed winter camelina and had higher fall canopy cover (15 vs. 7%), spring canopy cover (16% vs. 4%), and higher spring biomass (313 vs. 100 kg ha(-1) dry matter). Spring wheat, after rye, yielded 90% of the check. It is not recommended to plant spring wheat following winter rye, but there was no negative yield effect from winter camelina. Interseeding cover crops into soybean in the northern Plains is possible but needs further research to optimize interseeding systems.

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