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在大田已连续少耕３季的基础上，分区设定“２年４熟”一个轮耕周期的土壤耕法组合定位试验，对试验第４季的小麦进行了较系统的测定。结果表明：①轮耕后耕层土壤容重和穿透阻力居于连少和连耕之间，保持在小麦生长的适宜范围内，利于土壤供肥能力的提高和小麦根系的生长发育。②肥料和耕法对小麦含氮率和累积吸氮量均有影响，成熟期各耕法不施肥区茎秆和籽粒含氮率分别占施肥区的２／３和３／４左右，而累积吸氮量仅为施肥区的１／３；不同耕法中，无论施肥或不施肥均以轮耕为最高，施肥区籽粒含氮率和累积吸氮量分别比连少高１０．８％和３４．６％。③小麦产量以轮耕为最高，比连耕、连少增产２．７％～３４．２％；不同耕法不施肥区产量占施肥区产量比例不同，连少、连耕、轮耕分别约为４０％、４５％和５０％。可以认为在地力较差或施肥水平较低的地方更应避免长期连续少耕。
Based on the fact that field has been continuously cultivating three seasons for less than a year, the soil tillage combined positioning experiment of “two years and four ripening” rotation cycles was set up in a sub-region. The wheat in the fourth season was tested systematically. The results showed that: ① Tundra soil bulk density and percolation resistance resided between Lianxiao and even tillage, maintained within the proper range of wheat growth, which was conducive to the improvement of soil fertility and the growth and development of wheat roots. Fertilizer and tillage methods had effects on the nitrogen and cumulative nitrogen uptake of wheat, and the nitrogen content of stalk and grain in the non-fertilization areas during maturing period accounted for about 2/3 and 3/4 of the fertilization area respectively, Nitrogen absorption rate was only 1/3 of the fertilization area. In different tillage methods, the highest nitrogen fertilization rate and cumulative nitrogen uptake were no matter fertilized or no fertilization, and the nitrogen uptake was 10.8% 34.6%. ③ The yield of wheat was the highest in rotary tillage, 2.7% ~ 34.2% higher than that of continuous tillage, and even less in continuous tillage. 40%, 45% and 50%. It can be considered in less fertile land or fertilization level should be avoided long-term continuous less tillage.