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绿肥效果好坏,与翻压时期、后作安排,关系十分密切。因此,适期翻压、合理轮作,是提高绿肥效果的主要途径。 一、适期翻压,提高绿肥肥效 确定绿肥翻压时期,既要从绿肥作物本身鲜草及养份含量高低出发,也要考虑到绿肥腐烂特点、气象条件、养份的有效利用和作物种植制度等因素。 绿肥腐烂迅速,边腐烂边矿化,养份释放快而集中。据有关单位试验,绿肥养分释放高峰期出现在翻压后15～20天,本地区8月份以前翻玉绿肥,水热条件较好,绿肥腐烂迅速,容易造成养份流失。据友谊农场气象资料:8月份平均降雨量为121.9毫米,5～20厘米土层的平均地温为20.8～22.8度,这样的水热条件,对绿肥腐烂很有利。例如在我所黑土试验地上,于8月7日
Green manure is good or bad, and turn over time, after making arrangements, the relationship is very close. Therefore, the proper pressure turn, a reasonable rotation, is to improve the effectiveness of green manure the main way. First, the appropriate pressure over time to improve the effectiveness of green manure Green press time to determine the green, both from the fresh green crops and their nutrient content of high and low crop starting, but also take into account the characteristics of green manure rot, meteorological conditions, the effective use of nutrients and crop cultivation System and other factors. Degradation of green manure quickly, while the edge of mineralization, nutrient release fast and concentrated. According to the test of relevant units, the release peak of green manure appeared in 15 to 20 days after the pressure was turned on. In this region, jade green manure was turned over before August. The conditions of water and heat were good and the green manure decayed rapidly, which easily led to the loss of nutrients. According to Friendship Farm meteorological data: the average rainfall in August was 121.9 mm, 5 to 20 cm of the average ground temperature of 20.8 to 22.8 degrees, such a hydrothermal condition is very beneficial to the decay of green manure. For example, on the test ground of our black soil, on August 7