大麦与谷类科学

用商品有机肥替代部分化学氮肥,设置替代比例分别为0%(CK)、15%、30%、45%、60%、75%,研究其对小麦宁麦13产量及对相应耕地质量的影响。结果表明,商品有机肥替代基肥氮的比例为30%、45%时,与CK相比,小麦实测单位面积产量显著提高;替代比例为60%、75%时,则会减少小麦的有效穗数,从而造成减产。施用不同量的商品有机肥均可减轻土壤的容重,改善耕地土壤的物理性状。

In this experiment, a commercial organic fertilizer was used to replace 0%(the control), 15%, 30%, 45%, 60%, and 75% of a chemical nitrogen fertilizer as the basal nitrogen in order to study the effects of the different substitution ratios on wheat yield and farmland quality. The results showed that when the organic nitrogen fertilizer accounted for 30% and 45% of the basal nitrogen, the measured yield of wheat significantly increased as compared with the control. However, when the ratios of the organic nitrogen fertilizer accounted for 60% and 75% of the basal nitrogen, the number of effective ears of wheat decreased, resulting in a reduction of yield. On the other side, treatments with different amounts of the commercial organic fertilizer all reduced the bulk density of soil and improved the physical properties of cultivated soil.