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二年生白花草木樨是我国北方的主要绿肥作物之一。草木樨的利用,有当年翻压,第二年翻压及只利用根茬等方式。翻压的时间何时为好,怎样利用合适,肥田增产效果怎样,这都直接影响轮作效益。因而有必要通过试验查明粮草轮作中二年生白花草木樨的翻压适期。一、试验处理和方法试验于1978～1981年在所内进行。试验处理:(1)当年翻压,8月16日、8月26日、9月5日、9月15日、9月25日和10月5日共6期。(2)次年翻压,4月15日、6月6日、现蕾期和盛花期共4期。(3)当年根茬和次年根茬,以休闲为对照。
Biennial white flowers mulberry is one of the main green manure crops in northern China. Utilization of vegetation, there was the year pressure, the second year of pressure and only use stubble and other means. Turn when the pressure is good, how to use the right, fattening effect of production, which have a direct impact on the rotation efficiency. Therefore, it is necessary to test through the experiment to identify the two-year-old white forage crop in the turnip appropriate period. First, the experimental treatment and method of testing in the 1978 to 1981 within. Test treatment: (1) when the pressure over the year, August 16, August 26, September 5, September 15, September 25 and October 5 a total of six. (2) the following year turning pressure, April 15, June 6, budding and flowering period of a total of 4. (3) The same year stubble and the following year stubble, with leisure as a control.