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为研究在粮肥轮作条件下,不同绿肥品种及混播方式对土壤养分平衡和肥力的影响,以便更好地选配绿肥品种及合理施用肥料,自1981年9月进行了为期5年的定位试验,结果如下。 设计与方法 试验在1.0×1.5米的无底水泥池中进行。供试土壤为黄潮土,含有机质0.51％,全氮0.04％,速效磷(P_2O_5)20.2ppm,速效钾(K_2O)80.3ppm。试验处理为(1)苕子,(2)黑麦,(3)油菜,(4)苕
In order to study the effects of different green manure varieties and mixed sowing methods on soil nutrient balance and fertility under the conditions of grain and fertilizer runoff in order to better match green manure varieties and apply fertilizer reasonably, a 5-year positioning experiment was conducted in September 1981 The result is as follows. Design and method test in a 1.0 × 1.5 m bottomless cement pool. The test soil was yellow soil with 0.51% organic matter, 0.04% total nitrogen, 20.2 ppm available phosphorus (P2O5) and 80.3 ppm available potassium (K2O). The test treatments were (1) prickly heat, (2) rye, (3) rape, (4) prickly ash