不同柱花草绿肥种质氮含量的差异比较

Difference of the Nitrogen Contents among the Stylosanthes(Stylosanthes guianensias SW)

笔者对134份柱花草绿肥种质的氮含量进行了分析测定,结果表明：供试的134份柱花草绿肥种质的氮含量在2%以上的有35份,占全部种质的26.1%,含量在1.5%~2.0%的种质有98份,占全部种质的73.1%,这些种质的氮含量均达到2级水平,仅有1份种质的氮含量在1.5%以下,为3级水平。

Stylosanthes（ Stylosanthes guianensias SW） is a leguminous crop used as green manure and forage in the tropics. Nitrogen content is one of the important index affecting the green manure quality for the leguminous green manure. The nitrogen contents of 134 accessions of Stylosanthes green manure germplasm were analyzed and evaluated. The result indicated that 35 accessions of the germplasm contained more than 2% of nitrogen,accounting for 26. 1% of the total accessions of the germplasm; 98 germplasm accessions contained 1. 5%-2. 0%of nitrogen,73. 1% of the total germplasm accessions. All these accessions were grouped into class Ⅱ. Only one germplasm accession contained nitrogen below 1. 5% and were grouped into class Ⅲ.