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随着上海市郊区三熟制面积的逐年扩大,三麦茬口推迟,晚播造成冬前分蘖少,成穗率低,单产不稳。为提高三麦的产量,我们从1978年开始,以早熟3号大麦为主,研究了三麦(品种为早熟3号大麦、扬麦1号小麦、“757”元麦)的吸肥特点和分层施肥技术。分层施肥即施中层肥(占总施肥量的60%),将肥料施在耕作层;盖籽肥即表层肥(占总施肥量的20%),将肥料拌土盖籽;春肥(占20%)和看苗施用等几方面。
With the expansion of the three-acre system in the suburbs of Shanghai, the three-crop stalks have been postponed and the late-sowing has resulted in fewer tillers before winter, a low percentage of spikelets and unstable yields. In order to improve the yield of the three wheat varieties, we started from 1978 and studied the absorption characteristics of three wheat cultivars (early varieties No.3 barley, Yangmai No.1 and “757”) Stratified fertilization technology. Stratum fertilization is applied middle layer of fertilizer (60% of the total amount of fertilizer), the fertilizer applied to the tillage layer; cover seed fertilizer that surface layer of fertilizer (20% of the total amount of fertilizer) Accounting for 20%) and see the use of seedlings and other aspects.