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1供试材料供试青贮玉米品种:东青1号。供试肥料:磷酸二铵、硫酸钾、尿素(施入肥料养分计量单位以纯量N、P2O5、K2O计算)。2试验方法采用双因子试验,即密度、施肥量两个因子。2.1密度水平A:50 000株/hm2(株距0.28m,行距0.70m);B:55 000株/hm2(株距0.25m,行距0.70m);C:60 000株/hm2(株距0.23m,行距0.70m)。2.2施肥水平a:N 8kg P2O5 3kg K2O 4kg(即施磷酸二铵90kg/
1 test materials for testing silage corn varieties: East Green 1. Test fertilizer: diammonium phosphate, potassium sulfate, urea (fertilizers applied to the measurement of nutrients in pure N, P2O5, K2O calculation). 2 test methods using two-factor test, namely, density, fertilizer two factors. 2.1 Density level A: 50 000 plants / hm2 (spacing 0.28 m, spacing 0.70 m); B 55 000 / hm2 spacing 0.25 m spacing 0.70 m C 60 000 / hm2 spacing 0.23 m 0.70m). 2.2 fertilization level a: N 8kg P2O5 3kg K2O 4kg (that is, DAP 90kg /