期刊
AGRONOMY-BASEL
卷 12, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/agronomy12112678
关键词
multifunction buffers; ecosystem services; forage; Salix spp.; willow
资金
- United States Department of Agriculture National Institute for Food and Agriculture (USDA NIFA) [2018-68005-27925]
- Federal Capacity Funds through the New York State Agricultural Experiment Station
- BARD
- United States-Israel Binational Agricultural Research and Development Fund, Vaadia-BARD Postdoctoral Fellowship Award [FI-591-2019]
Riparian buffers are a practical strategy to reduce nitrogen runoff. Shrub willows, with their dense aboveground biomass growth, diffuse shallow root systems, and low water and nutrient use efficiencies, are well-suited for managing water quality. Irrigation with excess nitrogen fertilizer resulted in increased aboveground growth, with variations among genotypes, indicating potential for selection in breeding programs.
Riparian buffers are a practical strategy to reduce N runoff. Shrub willows (Salix spp.) are a well-suited natural means to manage water quality due to dense aboveground biomass growth, diffuse root systems at a shallow depth, and low water- and nutrient-use efficiencies that will maximize uptake. Perennial forage crops in the margins of agricultural lands could provide biomass for fodder. The response of fifty genotypes to a single N level of fertilizer under standard conditions at a very high nutrient loading level (500 ppm N, delivered weekly) was compared with water-only controls. Irrigation with excess N caused greater aboveground growth measured as biomass, stem length, and diameter, as well as morphological properties that varied significantly by genotype, indicating a potential for selection in a breeding program. SPAD was a reliable indicator of the effect of fertilizer on foliar crude protein and showed different effects of fertilizer on N uptake and nutritional value among genotypes. We identified genotypes that display high N uptake and good relative feed value. This intentional design for environmental benefits could have a dual purpose should this potentially nutrient-dense biomass by used as fodder for small ruminants.
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