黄淮海地区绿肥与化肥配施对棉花生长和肥料利用率的影响

采用田间土柱模拟试验，研究了绿肥翻压与不同比例化肥配施对棉花生长和肥料利用效率的影响。结果表明: 翻压绿肥处理的棉花花铃期叶片SPAD值较不翻压绿肥显著提高，说明翻压绿肥对棉花叶片叶绿素含量有显著影响; 翻压绿肥有助于棉花氮、 磷和钾素的吸收。翻压绿肥处理与不翻压绿肥相比，籽棉产量增加近30%; 翻压绿肥与70%的化肥配施，不会降低棉株养分积累量、 籽棉产量和肥料利用率，且棉花的化肥农学效率明显高于配施100%和85%的化肥处理。

Influence of combined application of green manure and inorganic fertilizers on cotton growth and fertilizer use efficiency in Huanghuaihai Area

 The soil column simulation experiment was used to study the effects of combined application of green manure matching with inorganic fertilizers on cotton growth and fertilizer use efficiency.The results show that at the blossoming and boll forming stages, SPAD values of cotton leaves of the green manure incorporated treatment are significantly increased compared with the single fertilizer treatment, which indicates that the green manure incorporated treatment has a significant influence on chlorophyll content of cotton and is helpful to the uptakes of cotton’s nitrogen, phosphorus and potassium. The seed cotton yield of the green manure incorporated treatment is increased by 30% compared with the single fertilizer treatment. The application of green manure matching with 70% inorganic fertilizers does not decrease the amount of cotton’s nutrient accumulation, the seed cotton yield and fertilizer use efficiency, moreover, the cotton’s fertilizer agronomic efficiency is significantly higher than those of the treatments matching with 100% and 85% inorganic fertilizers.