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Investigation of cultivation methods for the mechanization of hemp seed harvest

机译：大麻种子收获机械化栽培方法的研究

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To reduce the size of seed hemp plants, the effects of different delayed sowing dates (30 April, 31 May and 30 June) were investigated in 1999 and 2000 combined with chemical (Cycocel and Ethrel) and mechanical (polling) treatments. The trials were carried out at Anzola Emilia (Bologna) using the variety 'Carmagnola'. Each chemical treatment was repeated three times at two-week intervals starting from the appearance of the 6th true leaf. Polling was performed by manually removing 60 cm from the topof plants, once a height of 150 cm was reached. Late sowing was found to he very effective in reducing the size of the plant, however the latest date (30 June) is not recommended due to its negative effect on seed production (-32 percent). Ethrel, unlikeCycocel, produced shorter plants and also, unfortunately, fewer seeds. Polling was slightly less effective than Ethrel in reducing plant height, although it tended to produce more seeds than the control.
机译：为了减少种子大麻植物的大小，在1999年和2000年结合化学处理（Cycocel和Ethrel）和机械处理（轮询），研究了不同延迟播种日期（4月30日，5月31日和6月30日）的影响。试验在安索拉艾米利亚（博洛尼亚）使用品种'Carmagnola'进行。从第6张真叶的出现开始，每两周间隔将每种化学处理重复3次。一旦达到150厘米的高度，可以通过手动从植株顶部移开60厘米来进行轮询。人们发现晚播对减少植物的大小非常有效，但是由于其对种子产量的不利影响（-32％），因此不建议最新日期（6月30日）。与Cycocel不同，Ethrel生产的植物较短，种子也较少。轮询在降低植物高度方面的效果比Ethrel稍差，尽管它倾向于产生比对照更多的种子。

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