砂质潮土施用有机肥后效研究

采用长期定位试验 ,研究了砂质潮土一次性施入不同数量有机肥对数年小麦的产量效应、产量构成、品质、水分利用和土壤肥力的变化和影响 .结果表明 ,有机肥不仅能显著增加当季小麦产量、单位面积穗数和穗粒数 ,提高耕层土壤有机质、全氮、有效磷、有效钾含量和水分利用效率 ,而且有较长的后效 .小麦产量与有机肥用量的关系 ,随着时间的推移 ,由二次曲线回归效应转变为直线相关 ;小麦粗蛋白质、干湿面筋含量与有机肥用量呈显著正相关

Study on after-effect of organic manure in sandy soil

We studied the after-effect of manure applied in first year at different rates on wheat yield, yield components and quality, water utility and soil fertility in the following years with long-term experiments. The results showed that the manure not only significantly increased the yield, the ear number per unit area and seed number per spike of wheat but also enhanced the contents of soil organic matter, total nitrogen,available phosphorus and potassium in the tilled layer and the water utilization ratio in the current years. Importantly, organic manure had a considerable-length of after-effect. The relation of wheat yield and manure rates was converted from quadratic relation curve to linear correlation with time. The contents of crude protein and dry or wet gluten significantly and positively correlated with the applied manure rates.