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1981年至1984年,我们为研究丘陵沟壑区水土流失规律和水土保持综合治理效益,在陇县九子沟进行径流观测实验,于一个自然坡面上布设了坡度分别为10°17′、15°14′、19°40′和24°26′的四个农耕地径流小区,以此和水平梯田对照,研究不同坡度耕地的产流产沙量、土壤水分的变化规律及其对小麦产量的影响。小区面积100m~2(2×5),前茬为三年生苜蓿,供试作物小麦,耕作措施、播种量、施肥量基本相同。
From 1981 to 1984, in order to study the law of soil and water loss in the hilly and gully regions and the benefits of comprehensive management of soil and water conservation, runoff observation experiments were carried out in Jiuxiagou, Longxian. On a natural slope, the slopes were 10 ° 17 ’and 15 °, respectively 14 °, 19 ° 40 ’and 24 ° 26’, and compared with horizontal terraces, the effects of runoff and sediment yield, soil moisture and their effects on wheat yield were studied at different slopes . The plot area is 100m ~ 2 (2 × 5). The former crop is three-year-old alfalfa. The crop is wheat under test, and the cultivation measures, seeding rate and fertilizer amount are basically the same.