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小麦—休闲(W—F)是太平原地区主要的耕作制,但这种常规耕作在休闲期内土壤蓄水率(WSE)常低于25%。免耕技术可有效提高WSE。通过测定集约免耕制作物轮作过程中,耕作制、试区位置及当地蒸发速率对WSE的影响,表明在3a或4a轮作制中,小麦—玉米(W—C)休闲期WSE为48%,而W—F制中WSE仅为22%。在3a轮作制中,虽然休闲时间为11个月,但却与W—F制休闲14总个月的蓄水效果相同。根据不同地点不同的潜在蒸发量,采用不同的耕作制。研究表明集约的耕作制有更好的可行性,而免耕管理中的夏季休闲应该被淘汰。
Wheat-leisure (W-F) is the main tillage system in the Pacific Rim but this conventional tillage often has a soil water storage (WSE) of less than 25% during leisure. No-till technology can effectively improve WSE. The effect of tillage system, location of test plot and local evaporation rate on WSE during the rotation of intensive no-tillage crop indicated that WSE in wheat-corn (W-C) during leisure period was 48% in 3a or 4a rotation, The W-F WSE system is only 22%. In the 3a round of work, although the leisure time is 11 months, it is the same as that of W-F recreation for a total of 14 months. According to different potential evaporation at different locations, different farming systems are used. Studies have shown that tillage farming is better feasible and that summer leisure in no-tillage management should be eliminated.