| In its native China, the Tree of Heaven isn't a problem, but in a different habitat like Britain, the insects and diseases that normally keep its growth in check aren't here. How old is this one, then? Well, that is. The leaves you can see there is a year's growth, well less than a year's growth, several months. These things can grow three, four metres in a year, so this is not a particularly big one. In just less than a year, this is how high it can grow or higher? Yes. That's incredible. And there's baby down there, so that's just really in its first season. Okay. What kind of damage can it cause to our native plants? It just forms a thicket and actually just covers them. It also has a capacity to do something called allelopathy, which means that it produces chemicals from its leaves, and when rain falls onto it, the chemicals wash out of the leaves and soak into the ground. These chemicals actively inhibit the growth of other plants, so it's got a double whammy in that it's shading out other plants and then effectively poisoning its competitors as well, a very effective strategy if you're a Tree of Heaven, but pretty bad news for our native plants. Okay. It's a bit of a horror. I'll never look at one of these again in the same way. I have to. | |
| 在天堂树的故乡中国，它从不令人操心，但在环境迥异的英国，没有相应的昆虫和病害，来抑制它们的生长。 这棵树多大了 大概是可见的叶子都是一年之内生的，不到一年，几个月吧。这种植物一年之间就能长三四米，所以这株还不算大。 不到一年，它就可以长这么高，甚至更高 -没错。 不可思议呀 这下面还有棵树苗，还不到三个月大，这些它们对本地植物有什么危害呢？ 它们形成丛林，遮挡住本地植被，它还有"植化相克"的威力。这种树的叶子会分泌化学物质，当雨水落到树叶上，化学物质被冲掉，被土地吸收。这些化学物质能有效抑制，其他植被的生长，以它的遮蔽对其他植物的打击是双重的，争抢阳光的同时还毒害它们。这是天堂树的有力生存手段，但对于本土植物，则是噩耗，确实可怕，我要对它们另眼相看了。 |
| In its native China, the Tree of Heaven isn' t a problem, but in a different habitat like Britain, the insects and diseases that normally keep its growth in check aren' t here. How old is this one, then? Well, that is. The leaves you can see there is a year' s growth, well less than a year' s growth, several months. These things can grow three, four metres in a year, so this is not a particularly big one. In just less than a year, this is how high it can grow or higher? Yes. That' s incredible. And there' s baby down there, so that' s just really in its first season. Okay. What kind of damage can it cause to our native plants? It just forms a thicket and actually just covers them. It also has a capacity to do something called allelopathy, which means that it produces chemicals from its leaves, and when rain falls onto it, the chemicals wash out of the leaves and soak into the ground. These chemicals actively inhibit the growth of other plants, so it' s got a double whammy in that it' s shading out other plants and then effectively poisoning its competitors as well, a very effective strategy if you' re a Tree of Heaven, but pretty bad news for our native plants. Okay. It' s a bit of a horror. I' ll never look at one of these again in the same way. I have to. | |
| zai tian tang shu de gu xiang zhong guo, ta cong bu ling ren cao xin, dan zai huan jing jiong yi de ying guo, mei you xiang ying de kun chong he bing hai, lai yi zhi ta men de sheng zhang. zhe ke shu duo da le da gai shi ke jian de ye zi dou shi yi nian zhi nei sheng de, bu dao yi nian, ji ge yue ba. zhe zhong zhi wu yi nian zhi jian jiu neng zhang san si mi, suo yi zhe zhu hai bu suan da. bu dao yi nian, ta jiu ke yi zhang zhe me gao, shen zhi geng gao mei cuo. bu ke si yi ya zhe xia mian hai you ke shu miao, hai bu dao san ge yue da, zhei xie ta men dui ben di zhi wu you shen me wei hai ne? ta men xing cheng cong lin, zhe dang zhu ben di zhi bei, ta hai you" zhi hua xiang ke" de wei li. zhe zhong shu de ye zi hui fen mi hua xue wu zhi, dang yu shui luo dao shu ye shang, hua xue wu zhi bei chong diao, bei tu di xi shou. zhei xie hua xue wu zhi neng you xiao yi zhi, qi ta zhi bei de sheng zhang, yi ta de zhe bi dui qi ta zhi wu de da ji shi shuang chong de, zheng qiang yang guang de tong shi hai du hai ta men. zhe shi tian tang shu de you li sheng cun shou duan, dan dui yu ben tu zhi wu, ze shi e hao, que shi ke pa, wo yao dui ta men ling yan xiang kan le. |
| In its native China, the Tree of Heaven isn' t a problem, but in a different habitat like Britain, the insects and diseases that normally keep its growth in check aren' t here. How old is this one, then? Well, that is. The leaves you can see there is a year' s growth, well less than a year' s growth, several months. These things can grow three, four metres in a year, so this is not a particularly big one. In just less than a year, this is how high it can grow or higher? Yes. That' s incredible. And there' s baby down there, so that' s just really in its first season. Okay. What kind of damage can it cause to our native plants? It just forms a thicket and actually just covers them. It also has a capacity to do something called allelopathy, which means that it produces chemicals from its leaves, and when rain falls onto it, the chemicals wash out of the leaves and soak into the ground. These chemicals actively inhibit the growth of other plants, so it' s got a double whammy in that it' s shading out other plants and then effectively poisoning its competitors as well, a very effective strategy if you' re a Tree of Heaven, but pretty bad news for our native plants. Okay. It' s a bit of a horror. I' ll never look at one of these again in the same way. I have to. | |
| zài tiān táng shù de gù xiāng zhōng guó, tā cóng bù lìng rén cāo xīn, dàn zài huán jìng jiǒng yì de yīng guó, méi yǒu xiāng yìng de kūn chóng hé bìng hài, lái yì zhì tā men de shēng zhǎng. zhè kē shù duō dà le dà gài shì kě jiàn de yè zǐ dōu shì yī nián zhī nèi shēng de, bú dào yī nián, jǐ gè yuè ba. zhè zhòng zhí wù yī nián zhī jiān jiù néng zhǎng sān sì mǐ, suǒ yǐ zhè zhū hái bù suàn dà. bú dào yī nián, tā jiù kě yǐ zhǎng zhè me gāo, shèn zhì gèng gāo méi cuò. bù kě sī yì ya zhè xià miàn hái yǒu kē shù miáo, hái bú dào sān ge yuè dà, zhèi xiē tā men duì běn dì zhí wù yǒu shén me wēi hài ne? tā men xíng chéng cóng lín, zhē dǎng zhù běn dì zhí bèi, tā hái yǒu" zhí huà xiāng kè" de wēi lì. zhè zhòng shù de yè zi huì fēn mì huà xué wù zhì, dāng yǔ shuǐ luò dào shù yè shàng, huà xué wù zhì bèi chōng diào, bèi tǔ dì xī shōu. zhèi xiē huà xué wù zhì néng yǒu xiào yì zhì, qí tā zhí bèi de shēng zhǎng, yǐ tā de zhē bì duì qí tā zhí wù de dǎ jī shì shuāng chóng de, zhēng qiǎng yáng guāng de tóng shí hái dú hài tā men. zhè shì tiān táng shù de yǒu lì shēng cún shǒu duàn, dàn duì yú běn tǔ zhí wù, zé shì è hào, què shí kě pà, wǒ yào duì tā men lìng yǎn xiāng kàn le. |
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