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首页> 外文期刊>Journal of Plant Nutrition >Comparative Forage Yield of Poor Versus Good Grass Stands under Different Soil Fertility Regimes in Northeastern Saskatchewan
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Comparative Forage Yield of Poor Versus Good Grass Stands under Different Soil Fertility Regimes in Northeastern Saskatchewan

机译：比较饲料的差与良好的草地在东北萨斯喀彻温省的不同土壤肥力制度下

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Forage yield and its response to fertilizers are affected by the condition of forage stands. A field experiment was conducted on a Gray Luvisol (Typic Croyoboralf) soil at Pathlow in northeastern Saskatchewan, from 2004 to 2006, to determine if low forage yields in poor grass stands are due to nutrient deficiencies, other soil properties and/or species composition, and to determine if forage dry matter yield (DMY), protein concentration (PC), and protein yield (PY) in these areas could be improved by fertilization. The four fertilizer treatments: no fertilizernil, plus three combinations of increasing amounts of nitrogen (N), phosphorus (P), potassium (K), and sulfur (S) fertilizers (i.e., 45 kg N + 10 kg P + 12.5 kg K + 5 kg S ha-1; 90 kg N + 20 kg P + 25 kg K + 10kg S ha-1; and 135 kg N + 30 kg P + 37.5 kg K + 15 kg S ha-1) were applied annually to the same plots in early spring of 2004 and 2005. The lower forage yield in poor compared to good grass stand areas was most likely due to differences in plant species composition, although other factors such as soil fertility and compaction may have also contributed to lower DMY. There was a significant response of DMY, PC, and PY to applied N, P, K, and S fertilizers in both good and poor grass stands in both years. The DMY, PC, and PY in the first year (2004) continued to increase up to the highest fertilizer rate used in this study, but in the second year (2005) there was no increase in total DMY in both grass stands, and in PC and PY in good grass stand with application of fertilizer blend beyond the 90 kg N + 20 kg P + 25 kg K + 10 kg S ha-1 rate. Fertilizer application for two years also increased the proportion of smooth bromegrass in both stands, indicating that proper nutrient management may increase the proportion of smooth bromegrass (high yielding grass species) in the poor growth area, thereby improving forage yields. Overall, the findings indicate that forage yields and quality in poor grass stand areas can be improved considerably by applying fertilizer nutrients that are lacking in the soil. Also, the significant responses observed in the good grass stand areas suggest that these regions of the field can also benefit from additional fertilization.
机译：饲料产量及其对肥料的反应受到饲料架的条件的影响。从2004年至2006年，在东北萨斯喀彻温省的灰色Luvisol（典型克罗伊禽）土壤上进行了一个田间实验，以确定贫困草地站的低牧草产量是否是由于养分缺陷，其他土壤性质和/或种类组成，为了确定这些区域中饲料干物质产率（DMY），蛋白质浓度（PC）和蛋白质产率（PY）可以通过施肥来提高。四种肥料治疗：NO肥，加上3种增加量的氮气量（n），磷（p），钾（k）和硫（即，45kg n + 10kg p + 12.5kg k + 5kg S ha-1; 90kg n + 20kg p + 25kg k + 10kg s ha-1;每年施加135kg n + 30kg p + 37.5kg k + 15kg s ha-1） 2004年初和2005年春季的同一块地块。与良好的草架地区相比，较差的饲料产量较低，很可能是由于植物物种组成的差异，尽管土壤肥力和压实等其他因素可能已经导致较低的DMY贡献。 DMY，PC和Py在施用N，P，K和S肥料两年内施用的显着响应。第一年（2004年）中的DMY，PC和PY继续增加本研究中使用的最高肥料率，但在第二年（2005）中，两种草地的总DMY都没有增加，而且PC和PY在良好的草地上，施用肥料混合物超过90kg n + 20kg p + 25kg k + 10kg s ha-1速率。肥料应用两年也增加了两种展台的光滑狂热比例，表明适当的营养管理可能会增加贫困生长面积的光滑的熟油（高产草种）的比例，从而提高饲料产量。总体而言，调查结果表明，通过涂在土壤中缺乏的肥料营养素，可以显着提高贫困草地站点的饲料产量和质量。此外，在良好的草地站点中观察到的重要反应表明，这些领域的这些区域也可以从额外的施肥中受益。

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