Long-term impact of poultry manure on crop yield, soil and water quality, and crop revenue
Long-term impact of poultry manure on crop yield, soil and water quality, and crop revenue
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DOI：
10.1016/j.jenvman.2019.109582
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发表时间：
2019-12-15
影响因子：
8.7
通讯作者：
Soupir, Michelle L.
中科院分区：
文献类型：
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作者：
Hoover, Natasha L.;Law, Ji Yeow;Soupir, Michelle L.
1998年开始了一项长期的家禽粪便肥料研究，并在玉米-大豆（CS）轮作下持续到2009年。为了适应不断变化的景观趋势，从2010年到2017年，这些地块被转换为连续玉米（CC）。在CS和CC阶段，家禽粪便（PM）的作物轮作推荐的农学氮的比率和任何一半（CC阶段）或两倍（CS阶段）的推荐率。在整个研究期间，以作物推荐施用量（CS和CC阶段分别为168 kg N ha（-1）和224 kg N ha（-1））将尿素-硝酸铵（UAN）施用于比较地块。本研究的目的包括评估长期PM应用在不同的利率（PM2，PM和PM0.5）的经济效益，家禽粪便的应用对土壤健康和养分水平，作物产量和排水水质的影响。较低的NO3-N浓度的报告相比，在相同的农艺率施用UAN肥料时，从PM处理的地块排水。在重复施用20年后进行的土壤健康分析测试参数中，与UAN地块（4.6 g kg土壤（-1））相比，PM处理土壤（6.1-6.7 g kg土壤（-1））中存在的颗粒有机质（POM）显著更高，显示出稳定土壤颗粒，增加渗透和持水能力的潜力。结果表明，与UAN处理地块中观察到的产量相比，施用粪肥对玉米和大豆产量具有一致的积极影响。在CS阶段，我们估计PM和UAN处理的每美元支出的平均收入相同，而PM2的平均回报率低1%;在CC阶段，当PM 0. 5和PM与UAN处理相比时，观察到15%的回报率增加。如果管理得当，农田PM应用是多样化农业生态系统，改善土壤健康和提高农业经济的可持续选择。
A long-term poultry manure fertilizer study was initiated in 1998 and continued until 2009 under corn-soybean (CS) rotation. To match changing landscape trends, the plots were switched to continuous corn (CC) from 2010 to 2017. In both CS and CC phases, poultry manure (PM) was applied at the crop rotation recommended agronomic N rate and either half (CC phase) or double (CS phase) the recommended rate. Urea-ammonium nitrate (UAN) was applied to comparison plots at the crop recommended application rate (168 kg N ha(-1) and 224 kg N ha(-1) for the CS and CC phases, respectively) throughout the study. The objectives of this study include evaluation of the economic benefits of long-term PM application at various rates (PM2, PM, and PM0.5), and the impact of poultry manure application on soil health and nutrient levels, crop yield, and drainage water quality. Lower NO3-N concentrations were reported in drainage from PM treated plots when compared to UAN fertilizer applied at the same agronomic rate. Of the parameters tested for soil health analysis after twenty years of repeat application, particulate organic matter (POM) present was significantly greater in the PM treated soils (6.1-6.7 g kg soil(-1)) when compared to UAN plots (4.6 g kg soil(-1)), showing potential for stabilized soil particles, increased infiltration and water-holding capacity. The results show a consistent positive impact of manure application on corn and soybean yields when compared to yields observed in UAN treated plots. During the CS phase, we estimated the same average revenue per dollar spent for PM and UAN treatments, while the average return rate for PM2 was 1% lower; during CC phase,15% increased return rates were observed when PM0.5 and PM were compared against the UAN treatment. When managed properly, PM application to cropland is a sustainable option for diversifying agroecosystems, improving soil health and improving farm economics.