摘要
Flemingia macrophylla is a shrubby legume of Asian origin, little explored in Brazil. The objectives of this study were the evaluation of the regrowth biomass of the species, accumulation of nitrogen in the air and evaluation of decomposition and release of nutrients from the aerial part of flemingia. Both experiments were arranged in a randomized complete block design with four replications. The regrowth biomass estimation of flemingia was performed after cutting at different heights above ground level (0.0 m; 0.3 m; 0.6 m; 1.2 m). The highest cutting height (1.2 m) maximized biomass production, at all cutting dates. Up to 34 Mg DM ha-1 were measured in nine cuttings, at 1.2 m cutting height, the equivalent to 804 kg N ha-1, outperforming the 0.6 m cutting which yielded 29 Mg DM ha-1 and 691 kg N ha-1; the 0.3 m cutting treatment yielded 18 Mg DM ha-1 and accumulated 329 kg N ha-1; finally, cutting at ground level, yielded 16 Mg DM ha-1 with accumulation of 211 kg N ha-1. The half-life time (T1/2) of the decomposition was 91, 95 and 97 days for leaves, stems and stems + leaves, respectively. The release of N, P, Ca and Mg followed the same pattern of decomposition, however K was released in a more accelerated rate
摘要译文
弗吉尼亚大叶是一种亚洲起源的灌木，在巴西没有探索。本研究的目的是评估物种的再生生物量，在空气中氮的积累和评估从flemingia the的地上部分的营养物质的分解和释放两个实验以随机化完全区组设计，四个重复（0 ;0 ;0 ;1 ）切割后，进行了flemingia的再生长生物量估计 最高切割高度（1 2m）在所有切割日期最大化生物量生产在9个切割中，在1 切割高度测量高达34Mg DM ha ha -1 -1 / sup，相当于804kg N ha - 1 / sup，优于产生29 Mg DM ha sup -1 / sup和691kg N ha sup -1 / sup的0°切割; 0 3μm切割处理产生18Mg DM ha ha -1 -1并累积329kg N ha -1次-1;最后，在地面切割，产生16 Mg DM ha sup -1 / sup，累积为211 kg N ha 1m -1。分解的半衰期（T 1/2）为91,95和97天叶，茎和茎+叶，分别为N，P，Ca和Mg的释放遵循相同的分解模式，然而K以更加速的速率释放
SALMI, Alex;re Porto; GUERRA, José Guilherme Marinho; ABBOUD, Antônio Carlos de Souza ; GONCALVES JUNIOR, Murilo.. Regrowth, dynamics of decomposition and release of nutrients by flemingia (Flemingia macrophylla (Willd.) Kuntze ex Merr.).[J]. Revista Ceres, 2013,60(5): 735-743