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在爱德华王子岛 ,农民每年用于控制土壤侵蚀的费用超过 5 0 0万美元 ,这些费用并不能保证土地的可持续利用。在爱德华王子岛 ,主要土壤的可利用土层深度只有 2 5～ 40cm ,在土层如此浅的土壤上 ,侵蚀的影响是非常显著的 ,必须寻求减轻侵蚀的办法。研究人员调查了谷物—马铃薯 2a轮作地和谷物—饲草—马铃薯 3a轮作地的残茬管理和保留死地被物的效益。经模拟降雨显示 ,在采用 2a轮作制的地块 ,残茬管理可减少 5 0 %的侵蚀量 ,对块茎产量没有任何影响 ;在 3a轮作地块 ,侵蚀量减少近 90 % ,产量提高 7%。利用残茬管理措施后 ,耕作费用减少 6 0～ 16 0美元 /hm2 。残茬管理需采用新的耕作措施 ,耕作者和收割者需改变生产方式 ,以适应日益增多的植物残体。
In Prince Edward Island, peasants spend more than $ 5 million a year on soil erosion control and these costs do not guarantee the sustainable use of the land. In Prince Edward Island, the available soil depth of the main soil is only 25 to 40 cm. The impact of erosion on such soils is very significant and erosion mitigation must be sought. Researchers surveyed the effectiveness of stubble management and the preservation of dead land on cereal-potato rotation 2a and cereal-forage-potato 3a. The simulation rainfall showed that in the 2a-crop plots, stubble management reduced erosion by 50% and had no effect on tuber yield. In the 3a-plots plots, erosion decreased by nearly 90% and yield by 7% . After using stubble management measures, the farming cost will be reduced by 60 to 160 USD / hm2. Stubble management requires the introduction of new farming practices. Farmers and reachers need to change their mode of production to accommodate the growing number of plant residues.