我国高梁和苏丹草品种的含氰势及其幼苗生长过程中含氰势的变化

THE HCN POTENTIAL OF CHINESE SORGHUM AND SUDAN.GRASS VARIETIES AND THE CHANGES OF HCN POTENTIAL DURING THE GROWTH OF SEEDLING

本文分析测定了148个高粱[Sorghum bicolor(L.)Moench]和苏丹草(Sorghum su-danense)品种的含氰势(HCN-potential,HCN-p)及其幼苗生长过程中含氰势的变化。结果表明,HCN-p 超过1000ppm 的品种占94.59%。其中1400—1600ppm 范围内的占33.11%、1200—1400ppm 的占22.97%,1000—1200ppm 和1600—1800ppm 的各占17.57%和44.86%,低于1000ppm 和高于1800ppm 的只占11.44%。HCN-p 最低的有“忻梁80号”(672ppm)、苏丹草(753ppm)、“黄壳苏丹草”(856ppm)、“丽母鸡”(860ppm)和 M_(103)(876ppm)。HCN-p 最高的有“原新一号 A”(1967ppm)、“十三节”(1904ppm)、“米棒子”(大赉)(1900ppm)、“7503A”(1889ppm)和“米家红高粱”(1883ppm)。苏丹草的含氰势处于高粱含氰势的下限(约700ppm)。甜高粱的 HCN-p 则比较高,处于中上水平(1500ppm)。幼苗的含氰势以4天的幼苗为最高,其中又以第一叶的最高,第二叶次之,叶鞘居三,很的最低。

In this paper,we measured the HCN potential(HCN-p)of 148 sorghum(Sorghum hi- color(L.)Moench)and sudangrass(Sorghum sudanense)varieties and the changes of HCN-P during seedling growth.The results showed that most of the varieties had their HCN-p more than 1000 ppm(94.59%).Among them,33.11% belonged to 1400—1600 ppm,22.97% to 1200—1400 ppm,17.57% to 1000—1200 ppm,and 14.86% to 1600—1800 ppm.The varieties which HCN-p were less than 1000 ppm or higher than 1800 ppm had a little proportion (11.44%).The varieties with the lowest HCN-p were“Xinliang 80”(672 ppm),“Sudancao” (753 ppm),“Huangke Sudancao”(856 ppm),“Limuji”(860 ppm),and“M103”(876 ppm). Those with the highest HCN-p were“Yuanxin 1A”(1967 ppm),“Shisanjie”(1904 ppm),“Mi- bangz”(Da Lai(1900 ppm),“7503 A”(1889 ppm),and Mijia Honggaolian”(1883 ppm). Sudangrass had the lowest HCN-p(about 700 ppm),sweet sorghum had higher HCN-p(about 1500 ppm).with the seedling growth,HCN-p reached its highest value in 4-day-old seedling. The first leaf had the highest HCN-p content,the second leaf and sheath had lower and root had the lowest.