紫花苜蓿还田下施氮量和肥料种类对玉米生物量及氮素吸收的影响

本试验研究了紫花苜蓿还田下不同施氮量和肥料种类对玉米生物量及氮素吸收的影响。结果发现,施氮量对玉米叶片氮含量影响显著,肥料种类对玉米叶片氮含量和叶片氮吸收量影响显著,但对于其它观测指标则影响不显著。施用炭基肥条件下,籽粒生物量与叶片生物量呈正相关,与籽粒氮含量呈负相关,与茎秆氮含量呈负相关。施用化肥条件下,籽粒生物量与籽粒氮含量呈负相关。研究结果为紫花苜蓿用作旱田绿肥提供了部分数据参考。

Effects of Nitrogen Application Amounts and Fertilizer Types on Maize Biomass and Nitrogen Absorbability under the Condition of Returning Alfalfa to Field

The effects of nitrogen application amounts and fertilizer types on maize biomass and nitrogen absorbability under the condition of returning alfalfa to field were studied in this paper. The results indicated that nitrogen application amount significantly influenced leaf nitrogen content, fertilizer type significantly influenced leaf nitrogen content and leaf nitrogen uptake, however, these two factors had no significant effects on other characteristics. After the application of biochar-based fertilizer, seed biomass was positively related with leaf biomass but negatively related with seed or shoot nitrogen content While with the application of chemical fertilizer, there only existed negative relationship between seed biomass and seed nitrogen content Our study could somewhat provide experimental data reference for the use of returning alfalfa to dryland field.