轮叶党参遮荫栽培的生长发育规律

对一年生轮叶党参的生长发育规律进行了初步研究。结果表明：轮叶党参地上部生长最快时期是7月初至8月中旬；生物量增长最快时期是7月中旬至8月中旬；地下部伸长期是7月中下旬至8月中旬；增粗期是8月中旬至9月末。在植株养分积累上，地上部一般含氮量为2．65％-3．76％，7月中下旬达最高值，地下部含氮量为1．22％-2．79％；地上部、地下部在7月中下旬含磷量最高，分别为O．575％和0．426％；地上部在8月初舍钾量达到最高值3．52％。地下部6月中旬含钾量最高为3．02％；植株地上部氮、磷、钾含量明显高于地下部。

Growth Regularity of Shade-Cultivated Codonopsis lameolata

Growth regularity of annual Codonopsis lameolata was studied. The results showed the fastest growth period of the upper ground part was from early July to middle August. The fastest increasing period of biomass was from middle July to middle August. But the underground part growth was from late July to middle August. The period of becoming thicker was from middle August to late September. As far as plant nutrition accumulation was concerned, N content of the upper ground part was between 2.65 % and 3.76%. And it got the highest in middle and late July. N content of the underground part was between 1.22 % and 2.79 %. P content of the upper ground and underground parts was the highest in middle and late July. They were 0.575% and 0.426% respectively. And K content of the upper ground part was the highest in early August (3.52%). K content of the underground part is the highest in middle June (3.02 % ). The content of N, P and K of the upper ground part was higher than that of the underground part.