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1989～1990年于四川雅安进行了单播和混播豆禾牧草与水稻轮作的试验,筛选出南苜蓿→水稻,勒岱若百三叶→水稻,紫云英×黑麦草→水稻,南苜蓿×黑麦草→水稻,勒岱若白三叶×黑麦草→水稻5个生产效益高的轮作方式。牧草平均每公顷产鲜草26.51t,干物质3.63t;粗蛋白质727.5kg,代谢能22074.5MJ,有机物质消化率平均为72.84％,提高了土壤有机质、全氮和速效氮含量。水稻及其粗蛋白质产量平均分别为7.4(t/ha)和712.8(kg/ha)。全年合计粗蛋白质产量为1503.0kg/ha。这5个草粮轮作方式在四川及类似亚热带地区有重要的实用价值。
From 1989 to 1990, we conducted uni sowing and mixed sowing of gramineous and grass and rice rotation in Ya’an, Sichuan Province. The results showed that the growth of S. alfalfa → rice, Ledebai hundred trefoil → rice, Astragalus × ryegrass → rice, southern alfalfa × Ryegrass → rice, Ledebai white clover × ryegrass → paddy 5 production efficiency of the rotation mode. Herbage average 26.51t per hectare of fresh grass, dry matter 3.63t; crude protein 727.5kg, metabolic energy 22074.5MJ, organic matter digestibility average 72.84%, increased soil organic matter, total nitrogen and available nitrogen content. The average yields of rice and its crude protein were 7.4 (t / ha) and 712.8 (kg / ha), respectively. Annual total crude protein production was 1503.0 kg / ha. The five grass rotation modes have important practical value in Sichuan and similar subtropical regions.