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首页> 外文期刊>Sustainable Agriculture Research >The Influence of Bahiagrass, Tillage, and Cover Crops on Organic Vegetable Production and Soil Quality in the Southern Coastal Plain
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The Influence of Bahiagrass, Tillage, and Cover Crops on Organic Vegetable Production and Soil Quality in the Southern Coastal Plain

机译：南部沿海平原Bahiagrass，耕作和覆盖作物对有机蔬菜产量和土壤质量的影响

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Conventional farming utilizing bahiagrass (Papsalum notatum Flugge) in rotation with crops has been shown to increase yield, improve soil quality, and decrease weed and disease pressure. Organic production systems in the Southern Coastal Plain are challenged with limited soil fertility and a wide array of insect, disease, and weed pests. The purpose of this study was to investigate the influence of sequential years in bahiagrass and tillage (conventional and conservation) on organic vegetable yield and soil indices. After 0-4 years in bahiagrass, a crop rotation of rye and oats (winter cover crop), bush beans (spring vegetable crop), soybean (summer cover crop), and broccoli (fall vegetable crop) was implemented. Vegetable crop yields, plant biomass, plant C and N, and soil C, N, and P were measured for the four crops in the rotation over a three year period. Two years or more of bahiagrass prior to initiating the vegetable crop rotation showed positive effects on vegetable crop yields and soil quality parameters. Tillage treatments did not have a consistent effect on measured parameters. Soil C was not impacted by years in bahiagrass but was influenced by years of crop production. Potential soil N and P mineralization indicated an increase of soil organic fractions with years in bahiagrass. Available N increased after cover crops, and available P decreased with increasing years in bahiagrass.
机译：常规耕作利用轮作（Papsalum notatum Flugge）与农作物轮作，已显示出可增加产量，改善土壤质量并降低杂草和疾病压力。南部沿海平原的有机生产系统面临有限的土壤肥力以及各种各样的昆虫，疾病和杂草害虫的挑战。这项研究的目的是调查连续耕作和耕作（常规和保护）对有机蔬菜产量和土壤指标的影响。在Bahiagrass中种植0-4年后，实施了黑麦和燕麦（冬季覆盖作物），灌木豆（春季蔬菜作物），大豆（夏季覆盖作物）和西兰花（秋季蔬菜作物）的轮作。在三年的轮换期内，对四种作物的蔬菜作物产量，植物生物量，植物碳和氮以及土壤碳，氮和磷进行了测量。在开始轮作蔬菜作物之前，两年以上的马铃薯都显示出对蔬菜作物产量和土壤质量参数的积极影响。耕作处理对测得的参数没有一致的影响。土壤C不受多年生植物的影响，但受多年农作物生产的影响。潜在的土壤N和P矿化表明，Bahiagrass中土壤有机质分数随年份增加。覆盖作物后可利用氮素增加，而可利用磷素随着耕作年数的增加而降低。

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