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在1986—1988年两年试验中,田间试验和喂兔试验的结果表明,在旱地土壤上将豆科牧草与畜牧业配套纳入耕作制,在两年内实行“一季草三季粮”的轮作方式是旱地土壤利用的新途径,它与单纯种植粮食(麦——苕轮作)相比,可以获得8295元/ha的纯收入,较单种粮食高2800元/ha左右,同时可为土壤提供丰富的养分,增加土壤氮素180kg/ha,使土壤肥力不断提高,进一步保证了后季粮作的正常生长。即使在比“粮—粮”轮作少种一季的情况下,两年中“粮—草”轮作收获的粮食总量(20358.5kg/ha)亦比前者(18819.3kg/ha)高1539.2kg/ha。
In the 1986-1988 two-year trial, the results of the field trials and the rabbit-feeding trial showed that the combination of leguminous pasture and animal husbandry on dryland soil was included in the tillage system. The rotation mode of implementing the “three season grain crops” within two years was It is a new way to use dryland soil, which can get a net income of 8,295 yuan / ha compared with the simple planting of grain (wheat-stirrup rotation), which is about 2,800 yuan / ha higher than that of single grain. At the same time, it can provide rich Nutrients, increasing soil nitrogen 180kg / ha, so that soil fertility continues to increase, to further ensure the normal growth of grain crops for the latter quarter. The total grain yield (20358.5kg / ha) harvested by the “grain-grass” rotation in the two years was also 1539.2kg / ha higher than that of the former (18819.3kg / ha) even at a season shorter than the “grain-grain” rotation .