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黑龙江省种植绿肥已有廿余年历史。它经历了三个阶段,即五十年代的试种阶段;六十年代的扩大示范阶段和七十年代绿肥作为改土增肥新途径、耕作改制的新内容重新纳入各级农业部门的工作议程。目前全省有各种绿肥面积达百余万亩,绿肥生产科科研进入一个新时期。省委提出把种植绿肥做为改土增肥的重要措施来抓,并号召在全省扩大示范推广。为明确绿肥在我省的肥效促进绿肥的发展将各地多年试验示范资料统计整理并提出提高肥效的几点意见如下。
Heilongjiang Province has been planting green manure more than 20 years of history. It went through three stages, namely, the trial cultivation stage in the 1950s; the enlarged demonstration stage in the 1960s and the green manure in the 1970s as a new way to increase soil fertility; the new content of farming reform was reintroduced into the work agenda of the agricultural departments at all levels . At present, the province has a variety of green manure area of more than 100 acres, green manure production research into a new era. The provincial party committee put forward planting green manure as an important measure to improve soil fertility and call for expanding demonstration and extension in the province. In order to clarify the role of green manure fertilizer in the province to promote the development of green manure will be many years of experimental demonstration data statistics and put forward some suggestions to improve fertilizer efficiency are as follows.