Effect of burial depth on emergence of Panicum repens
Effect of burial depth on emergence of Panicum repens
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DOI：
10.1017/s0043174500091281
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发表时间：
1999-11-01
期刊：
影响因子：
2.5
通讯作者：
Kuniyoshi, K
中科院分区：
文献类型：
--
作者：
Hossain, MA;Ishimine, Y;Kuniyoshi, K
在温室条件下，匍匐黍根茎从1 ~ 20 cm土层中长出2节以上的根茎。从一个节点的根茎出现大大减少在深度超过5厘米。相反，当埋深（BD）大于20至30厘米时，从姜状根茎的秆出现减少。白三叶出现在更深的土壤水平与越来越多的节点每次切割。秆出现从地下再生器官总数的36%。约75%和95%的出现秆埋后30和60天，分别记录，和91%的出现记录从20厘米BD。在实地研究中，只有9%的节点产生秆以下交叉犁。整地后50和60 d分别有61%和67%的出苗率。结果表明，机械和化学防治方法在整地后50 d左右对白三叶的防治效果最好。深耕埋深30 cm以上和错耕缩短根茎长度可有效降低白三叶的出苗率。
In glasshouse experiments, Panicum repens rhizomes with more than two nodes emerged from soil depths of 1 to 20 cm. Emergence from one-node rhizomes was greatly reduced at depths more than 5 cm. In contrast, culm emergence from ginger-like rhizomes decreased when burial depth (BD) was greater than 20 to 30 cm. P. repens emerged from deeper soil levels with an increasing number of nodes per cutting. Culms emerged from 36% of total underground regenerative organs. About 75 and 95% of the emerged culms were recorded 30 and 60 d after burial, respectively, and 91% emergence was recorded from 20-cm BD. In field studies, only 9% of nodes produced culms following cross-plowing. About 61 and 67% of the emerged culms were recorded 50 and 60 d after land preparation, respectively. Results indicate that mechanical and chemical control methods could be most effective for P. repens when applied approximately 50 d after land preparation. Burying deeper than 30 cm by deep plowing and reducing rhizome length by cross-plowing might effectively reduce emergence of P. repens.