不同用量的有机肥对陇东旱地春玉米生长特性及产量的影响

摘要

研究了有机肥用量对陇东旱塬黑垆土土壤养分及春玉米生长发育和养分吸收的影响。结果表明：在等氮量的条件下配施有机肥，对旱地春玉米有增产作用，但差异不显著。在一定范围内，随有机肥用量的增加，玉米百粒重、穗行数、籽粒干物质积累显著增加，光合特性明显改善，其中高量有机肥的 T4处理较单施等量氮的 T1处理产量增加了15．4%，较 CK 增加了48．4%。施用有机肥增加了土壤有机质、全量及速效氮、磷、钾含量，有效促进了植株对氮、磷、钾的吸收。%Effects of different amount of manure on soil nutriment, spring maize growth and nutrient absorption were studied in this research. The result indicated that: the organic fertilizer combined with chemical nitrogen fertilizer could increase yield of Spring Maize on dry land but not significantly. In a certain range, with the increasing of organic fertilizer amount applied, 100-grain weight, rows per ear and dry matter of grain were significantly increased, and photosynthetic characteristics were im-proved. Yield of T4 treatment with highest amount of organic fertilizer increased by 15. 4% and 48. 4% , compared with those of T1 treatment with equal chemical nitrogen and CK. Application of manure increased the contents of soil organic matter, total nitrogen, available nitrogen, available phosphorus and available potassium, effectively promoted the absorption of N, P, K by plants, and maize root development was enhanced.