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首页> 外文会议>American Forage and Grassland Council Conference >EFFECTS OF CORN CROP RESIDUE GRAZING ON SOIL PHYSICAL PROPERTIES AND SUBSEQUENT SOYBEAN PRODUCTION IN A CORN-SOYBEAN CROP ROTATION
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EFFECTS OF CORN CROP RESIDUE GRAZING ON SOIL PHYSICAL PROPERTIES AND SUBSEQUENT SOYBEAN PRODUCTION IN A CORN-SOYBEAN CROP ROTATION

机译：玉米作物残留物放牧对土壤物理性质及随后的大豆产量在玉米 - 大豆作物旋转中的影响

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High winter feed costs associated with stored feeds are detrimental to the profitability of Midwest beef cattle enterprises. Therefore, many producers graze corn crop residues as an alternative to feeding hay. However, there is concern that grazing corn crop residue fields will cause compaction resulting in lower crop yields the following year. Therefore, two locations in Iowa (Chariton and Atlantic) were used to study the effects of corn crop residue grazing by beef cows on soil characteristics andsubsequent soybean yields. After two years of study at both locations, organic matter yield of crop residue decreased at a faster rate in grazed fields than ungrazed fields, but corn crop residue composition did not differ between grazed and ungrazed fields, pre-, mid- and post-grazing. Corn crop-residue cover and soil roughness were greatly affected by the interaction of grazing and weather conditions. When soils temperatures were above freezing and precipitation was adequate, cattle traffic increasedsurface roughness, while reducing residue cover. Corn crop residue grazing increased the ratio of penetration resistance measured 15 feet outside to inside grazing exclosures by an average of 40% because of paddocks grazed when soils were unfrozen and at an adequate moisture content. But CR grazing did not cause any increase in bulk density measurements or differences in soybean yields in the subsequent growing season.
机译：与储存饲料相关的高冬季饲料成本对中西部牛肉企业的盈利能力有害。因此，许多生产者将玉米作物残留物作为喂养干草的替代品。然而，担心放牧玉米作物残留场将导致较低的作物产生的压实导致较低的一年。因此，爱荷华州（查顿和大西洋）的两个地点用于研究玉米牛粪在土壤特征上饲养玉米作物残留物的影响，并进行豆荚豆豆​​产量。经过两年的研究，在两个地方的研究中，农作物残留物的有机质产量在放牧的田地的速度下降而不是未甲片的田地，但玉米作物残留物组合物在放牧和未加工的田地之间没有区别，预先，中草，中间和地放牧之间没有差异。玉米作物残留覆盖和土壤粗糙度受到放牧和天气条件的相互作用的大大影响。当土壤温度高于冷冻和沉淀时足够，牛流量增加了表面粗糙度，同时还原残留物。玉米庄稼残留物放牧增加了渗透率的比率，在外面的15英尺处测量到内部放牧排水管平均为40％，因为当土壤未来并以足够的水分含量时，围草覆盖。但Cr Grazing没有引起随后的生长季节的批量密度测量或大豆产量的差异。

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