MUSK THISTLE (CARDUUS-THOERMERI) SEED PRODUCTION
MUSK THISTLE (CARDUUS-THOERMERI) SEED PRODUCTION
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DOI：
10.1017/s0043174500040935
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发表时间：
1982-01-01
期刊：
影响因子：
2.5
通讯作者：
MCCARTY, MK
中科院分区：
文献类型：
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作者：
MCCARTY, MK
在内布拉斯加州的林肯附近[美国]研究了麝香或点头蓟（用于大花种Carduus，C. macrocephalus Desf.，C. nutans L.，C. thoermeri Weinm.）。四个水平的种子成熟度进行了研究，从不同的植物群体的头收获在盛开阶段，盛开后2天，盛开后4天，并在完全成熟。第一次开花（终端）平均为. apprx。1000粒种子/头和最后开花的（植物基部附近的侧枝），125.当在盛花期全部剪去穗时，植株仅产生26粒优质种子/植株，但允许穗成熟的植株产生3580粒优质种子/植株。在开花后第2天和第4天剪去头的植株分别产生72和774粒优质种子。
Seed production was studied near Lincoln, Nebraska [USA] for musk or nodding thistle (common names used for large-flowered species of Carduus, C. macrocephalus Desf., C. nutans L., C. thoermeri Weinm.). Four levels of seed maturity were studied from separate groups of plants with the heads harvested at the full-bloom stage, 2 days after full bloom, 4 days after full bloom and at full maturity. The 1st heads to bloom (terminal) averaged .apprx. 1000 seeds/head and the last to bloom (lateral branches near the base of the plant), .apprx. 125. Plants produced only 26 good quality seeds/plant when the heads were all clipped at the full-bloom stage, but the plants with heads allowed to go to maturity produced 3580 of the good quality seeds/plant. Plants with heads clipped at 2 and 4 days after full bloom produced 72 and 774 good quality seeds, respectively.