三种豆科决明的干物质与氮磷钾含量变化动态研究  

Dynamics of dry-matter yields and NPK contents in three species Cassia

作　　者：罗涛[1] 翁伯奇[1] 林允钦 黄东风[1] 王飞[1] 

机构地区：[1]福建省农业科学院土肥所,福建福州350013 [2]福建省宁德市农业局土壤肥料试验站,福建宁德352100

出　　处：《草业学报》2003年第1期94-98,共5页Acta Prataculturae Sinica

基　　金：福建省科技厅重大项目(2000T005)资助。

摘　　要：参试的巴拉圭羽叶决明、墨西哥圆叶决明、巴西圆叶决明适宜在南方红壤区作为豆科牧草种植。其产量表现为迟开花的墨西哥圆叶决明产量最高,最早开花的巴西圆叶决明产量最低。决明的茎叶比在各生育期波动较大,巴拉圭羽叶决明、巴西圆叶决明分别在盛花期和结荚期比值最小,而墨西哥圆叶决明在成熟期比值最小。决明叶片的氮、磷、钾、粗蛋白、粗脂肪含量均高于茎秆,且随着成熟度的提高而下降。决明在结荚期至成熟期刈割,获得的营养价值最高。Cassia nictitans cv ATF2217, Cassia rotundifolia cv 86134 and Cassia rotundifolia cv 92985 are suitable for planting in the red soil region of Southern China. The hay yield of Cassia rotundifolia cv 86134 which blossomed lastly was the highest, but that of Cassia rotundifolia cv 92985 which flowered firstly got the lowest. The ratio of stem to leaf of Cassia is very different in different reproductive periods. The ratio of stem to leaf of Cassia nictitans cv ATF2217 in fullbloming stage, of Cassia rotundifolia cv 92985 in podding stage, and of Cassia rotundifolia cv 86134 in ripening stage reached the minimum respectively. The study also indicated that the contents of N, P, K, crude protein and fat in leaf were higher than those in stem, and they decreased with the enhancement of plant maturity. As a result, the nutritive value of Cassia was the highest, between podding stage and ripening stage. It is suggested that the period between podding and ripening stage is the best time for harvest.

关 键 词：豆科决明 干物质 氮 磷 钾 动态 研究 牧草 

分 类 号：S541.01[农业科学—作物学]