论文部分内容阅读
采用田间小区试验,研究不同供氮水平对杂交狼尾草产量、硝酸盐含量及烘干率的影响。结果表明,随着施氮水平的提高,杂交狼尾草(Pennisetum americanum × P.purpureum)的产量也明显提高,但相同的施氮水平对不同品种的影响差异不显著,单茬最高产量出现在8月份,在N3(300kg/hm2)水平时,闽牧6号杂交狼尾草(S16)的总产量(15.34kg/m2)虽然比推广品种杂交狼尾草(S1)总产量(14.84kg/m2)高,但差异不显著;硝酸盐含量,也随着氮素水平的提高而提高,试验期内,8月份的硝酸盐含量最低,闽牧6号的硝酸盐含量在相同的施氮水平下均较高,说明硝酸盐更易于在闽牧6号体内积累,但在0～300kg/hm2氮肥水平下,硝酸盐含量均处在牲畜的安全食用标准内;烘干率不受施氮水平的影响,只与生长量有关,生长量大,则烘干率高。
Field trials were conducted to study the effects of different nitrogen levels on yield, nitrate content and drying rate in hybrid Pennisetum. The results showed that the yield of hybrid Pennisetum americanum × P.purpureum also increased significantly with the increase of nitrogen application rate. However, the effect of the same nitrogen application rate on different varieties was not significant. The highest yield of single crop occurred at In the month of August, the total yield (15.34kg / m2) of hybrid Pennisetum of Minmu 6 hybrid was higher than that of the hybrid variety Penicillium sibiricum (S1) at N3 (300kg / hm2) m2), but the difference was not significant. The nitrate content also increased with the increase of nitrogen level. During the experiment period, the nitrate content in August was the lowest. The nitrate content in Minmu 6 was the same at the same nitrogen level The results showed that nitrate was more likely to accumulate in Minmu 6, but under the 0 ~ 300kg / hm 2 nitrogenous fertilizer level, the nitrate content was within the safe consumption standard of livestock; the drying rate was not affected by nitrogen level The impact, only with the amount of growth, growth, drying rate is high.