不同采收期对半夏块茎产量和品质的影响

在喀斯特温和气候区,研究半夏适宜采收期,为半夏生产提供服务。采用田间小区试验法,从8月1日到9月30日,每15天采收一期,共5个不同采收时期,以半夏块茎鲜产量、大中小性状和总生物碱含量为考察依据。结果表明:随着采收期的推迟,半夏块茎鲜产量呈开口向下抛物线型,以9月1日采收块茎鲜产量最高,为1.51kg/m2;总块茎数量最多,为1440.3粒/0.5m2;中块茎率56.1%;总生物碱含量0.0303%。因此,在喀斯特温和气候区半夏最佳采收时间为9月上中旬。

Effect of Harvest Time on Yield and Quality of Pinellia ternata

Appropriate harvest time was studied to provide service to Pinellia ternata production in Karst warm climatic zero. Adopting small plot experiment in the field, taking fresh tuber yield, total alkaloids content and big, middle, small tuber as investigation basis, we studied effect of different harvesting time （time from August 1st to September 30th was divided into five harvest time） on yield and total alkaloids content. With the delay, fresh tuber yield of Pinellia ternata appeared an inverted-U parabola. Harvesting on September 1st, fresh tuber yield （1.51 kg/m2） was the tallest, total tuber number （1440.3 grain/0.5 m2） was the largest, proportion of middle tubers’quantity to total grain quantity was 56.1%, total alkaloids content （0.0303%） was the tallest. So early and mid-September was the best harvest time of Pinellia ternata in Karst warm climatic zero.