Spring barley performance benefits from simultaneous shallow straw incorporation and top dressing as revealed by rhizotrons with resealable sampling ports
نویسندگان
چکیده
Abstract Plant residues with larger carbon (C) to nitrogen (N) ratios can stimulate microbial growth and thereby protect soil nutrients from leaching. In poorly fertilized soil, excessive immobilization may limit nutrient availability thus plant growth. Little is known about the impact of a shallow straw incorporation on regulation top-dressing fertilizer spring crop establishment. We aimed evaluate if wheat in combination mineral has more positive effects performance than fertilization alone this relates changes extractable C:N:P ratio activity close roots. order conduct small-scale sampling minimal disturbance during barley ( Hordeum vulgare L.), we developed rhizotrons resealable ports. Rhizotrons were filled loamy-sandy an equivalent 150 kg N 80 P ha −1 . Half received top dressing together 4500 straw-C Throughout 90-day greenhouse experiment, analyzed dynamics, dioxide (CO 2 ) nitrous oxide (N O) emission, biomass, selected bacterial genes (abundance), transcripts (activity) bulk root-affected at multiple times. focused nitrifiers denitrifiers linked our data Interactions between roots caused shifts towards C:P C:N soil. These associated increased 16S rRNA denitrifier activities. Straw biomass by 124% topsoil same time root 125% number tillers 80%. concluded that activation root-straw interface positively feed back performance. Further research actively prime mining previously immobilized detritusphere or pathogen suppression promotion are dominating.
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ژورنال
عنوان ژورنال: Biology and Fertility of Soils
سال: 2022
ISSN: ['0178-2762', '1432-0789']
DOI: https://doi.org/10.1007/s00374-022-01624-1