An short article that i came across in http://aquariumfarm.com. Who can translate it?水草會呈現紅色的原因基本上而言,水草的葉片是由葉綠素和花青素所共同主導,當葉綠素多於花青素時,水草就會呈現綠色,為當花青素多於葉綠素時,水草就可能呈紅色。
水草的花青素之形成,似與水草組織中的糖分聚積有關。當水中的光合作用增強時,有助於水草組織中的糖量增加時,葉綠素的合成率沒有糖費聚積快速故能呈現紅色的外觀。
水草利用鐵肥最多的地方市用在於體內合成的"葉綠素酵素",以催化水草體內的鎂能合成葉綠素,因此若水草缺乏鐵肥將難以合成葉綠素,這對水草的光合作用有嚴重的影響,所以我們可以得知,鐵肥對水草的重要性是不可忽視的,但是,紅色水草的呈紅色(如你的紅蝴蝶),應理與鐵肥無直接的關係是可以肯定的,也就是說鐵肥並不能使紅色水草體色增艷。
我們只能說,因為施加鐵肥後,水草的葉綠素可能增多了,因此葉綠素的量越多,光合作用率就會相對提高,固有助於糖之聚積,此對花青素的合成影響是很大的。
所以要是紅色的水草體色增艷,主要並不是光施加鐵肥就夠了,而是要有利於花青素行程的環境,即高光度,二氧化碳,低溫,低氮肥,儘量少用紅光等..。
Basically, it is saying iron is not importan in making red plants red. It is about strong light, co2, low temp, less reddish light.
What do you think?
人的一生﹐ 全靠奮斗﹐ 唯有奮斗﹐ 才能成功
Roland, we went about it sometime back I think in this forum. Low stable NO3 will do that...(hence low light, moderate fish load, regular feeding will do that whether with CO2 or non CO2..non-CO2 tanks can go very long without much issues since the rate of growth is very low). If you do it with high light, you are going to stunt the tips after sometime once the NO3 bottoms out. By the way, very red plants are unhealthy plants (NO3 stressed..).
Regards
Peter Gwee
yup, i read about that thread too. But the taiwanese (or hongkong) school of taughts discussed in that forum is quite the opposite way. Not a bad idea to share and discuss different ways and concepts. Most of their tanks have beautiful red stem plants.
Refering to photos of Ludwigia pantanal in the wild in kasslemann's book, they are really red. If very red = NO3 Stressed, does it means the natural biotope are NO3 depleted? How can we be sure since there is not results of water test done there? And the lighting is the Sun, nothing we can achieve.
By the way, any guys out there have achieved very red growth? Care to share what you were doing to it?
人的一生﹐ 全靠奮斗﹐ 唯有奮斗﹐ 才能成功
Hmm... from Babel Fish
The water plant can present the red reason basically says, water plant's leaf blade is and 花青素 the institute leads together by the chlorophyll, when the chlorophyll is more than 花青素, the water plant can present the green, for when 花青素 is more than the chlorophyll, the water plant possibly assumes red.
The water plant 花青素 the formation, resembles with the water plant organization in the sugar minute accumulates concerns. When in water photosynthesis enhancement, when is helpful in the water plant organization the sugar quantity increase, the chlorophyll 合成率 does not have the sugar expense to accumulate fast therefore can present the red outward appearance.
The water plant with lies in vivo synthesis using the hard fat most places city "chlorophyll enzyme", catalyzes water plant in vivo the magnesium to be able to synthesize the chlorophyll, therefore if the water plant will fat lack the iron fat with difficulty to synthesize the chlorophyll, this will have the serious influence to water plant's photosynthesis, therefore we will be allowed to know, the iron fat to water plant's importance will be noticeable, but, the red water plant will assume red (for example your red butterfly 蝶, to be supposed to manage and the hard fat not direct relations is may firmly, the iron be in other words fat certainly cannot make the red water plant body color to increase colorfully.
We only can say, after because exerts the iron fat, water plant's chlorophyll possibly increased, therefore the chlorophyll quantity are more, the photosynthesis 作用率 can the relative enhancement, firmly be helpful accumulating of to the sugar, this to 花青素 the synthesis influence is very big.
Therefore if the red water plant body color increases colorfully, mainly certainly was not the light exerts the iron to be fat 夠, but was must be advantageous to 花青素 the travelling schedule environment, namely the high luminosity, the carbon dioxide, the low temperature, the low nitrogenous fertilizer, as far as possible little used the thioindigo red and so on. .
I was browsing some taiwan sites and happened to saw this.....紅色水草
栽植的條件
要種植美麗的紅色水草，表現水草的色澤與姿態，水草的種植條件就非常的重要，在此特別將紅色水草的條件依水溫、PH值、鐵元素、硬度、二氧化碳的含量、光源，這幾項來介紹。
◎水溫：
一般而言，紅色系水草大致上需求的水溫，較一般水草低，約20~23℃為最適合的範圍，否則水草無法吸收養分及行光合作用，使水草葉片伸展及呈現鮮紅葉片。（水溫越高、水草的呼吸率會超越光合速率而影響酵素的活動率；水草的呼吸會消耗能量，而酵素的活動則會產生能量，因此消耗的能量大於產生的能量，光合作用則會降低 ; 且水溫低則二氧化碳較易溶解停留於水中，水溫越高則二氧化碳停留水中的時間越短，越容易揮發。）
◎鐵元素：
除應有的元素外，另需不可短暫欠缺之微量元素－－鐵劑。依加鐵劑的品質、含量、時間，便會產生呈現紅色的深淺程度之差異。如細葉屬的百葉草最為明顯。
一般而言，鐵劑在添加後，短時間內就會氧化，所以容易缺乏 ; 添加時間應配合光合作用旺盛時添加，才能有效的吸收利用。因此鐵劑需要每日添加，才不致缺乏。
◎弱酸性水質：
水中PH值6~6.4時最佳。當PH值越上升時，紅色色澤越偏向於紫藍色（當PH昇高時，花青素就會產生沉澱，所顯現的顏色就偏向紫紅色，而PH越高則沉澱越多，顯現的顏色就越偏向紫藍色。），應配合CO2釋放量，調整PH值。
◎硬度：
應視各種水草所適應的硬度栽培，一般的紅色水草大多需要較高的硬度（KH硬度（碳酸硬度）－－因吸收碳酸鈣、鎂快，易缺乏，需要補充﹔GH硬度（總硬度）－－總硬度高電導度則高，紅色水草大多需要高的電導度）。否則較難呈現喜愛的紅色葉片。倘若硬度不適合水草時，便無法吸收養分，而產生頂芽附近白化，生長不良。
==> 紅色水草中的紅菊花及百葉草，需低硬度的水質。
◎CO2之水中含量：
紅色水草除需高照度等條件外，尚需高量的CO2始能自橙紅色轉變成深紅色。尤其細葉屬的紅色水草對於二氧化碳的需求量更高，如小紅莓。
==> 有關CO2的詳細內容，請看【專欄全集】二氧化碳的添加。
◎光照度：
a. 紅色水草一般需要強光，始能呈現漂亮的紅色，尤其寬葉屬的紅色水草如果沒有高光量就無法顯現深紅（如大紅葉）。
b. 光線充足外，更需要比綠色系水草的照明時間長，始能有充分的時間進行光合作用。因為紅色水草自早上開始點燈後，尚需一小時的時間作為取消休眠狀態，（如展開葉片、展開葉尖光合點等），之後才會開始進行光合呼吸動作。
==>影響光照度的因素：
水面油膜：水缸中的出水口，如有斜向水面時，及產生水面波浪造成折射光度，而減少光源射進水中的光量。
照明燈管使用過久，光量不足，
反射板或壓克力透明板久未擦拭，都會造成光量減少。
◎光質：
一般水草缸的水草照明燈大致上採用三波段合一的波長（即430nm、555nm、630nm前後波長），此型波段係使用於大眾化的水草光源，然而紅色系水草除三波段燈管外，尚需另配一支“藍光、綠光”的燈源，提供紅色水草進行光合作用。當紅光照射葉片時，紅色葉片會將紅色光部分反射及透過而未吸收，而無法利用紅光波段的光量，為此需另加一支藍、綠波段的光源來彌補。
由此可知，綠色系水草以紅、藍光為宜。而紅色系水草以“近紫外線”的藍、綠光譜為主。光質越強則水草的花青素形成就越多，而紅色的展現就越明顯。
heres more, part 2 actually植栽的注意事項
紅色水草在栽植時，除了要有好的栽植條件外，仍有其他需要注意的事項，以下將介紹水質與藻類的關係，此乃影響著水草能否正常生長﹔還有些為人所忽略的具抗拒性水草。
◎水質與藻類：
水質要穩定。當水質急遽變化，如移植它缸、翻缸等因素的急變，會導致頂芽產生萎縮、扭曲、皺葉等現象。（百葉草最為明顯）
紅色水草喜愛硝酸鹽濃度低，甚至不存在的水質。當硝酸鹽濃度高，會阻礙鐵的吸收，影響水草的生長。
在新設缸初期應勤於換水，並確實去除缸底上的枯葉以防止水質惡化。水質管理除勤於換水，改善水中過多硝酸鹽外，可在缸中配合紅色水草景的景觀，種植綠色系的「生長較快水草」以減低硝酸鹽的含量。例如：大葉菊、中柳、小柳、水蘊藻、小羅蘭、小圓葉…等。（當硝酸鹽過高時，紅色水草不易存活。）
水草吸收養分行光合作用等最直接的部位是「新葉的末端點」---葉尖部位，然而妨礙此點的物質，除魚病藥、過量的化學肥料外，藻類如果附著於葉片上（尤其是葉尖的呼吸生長點），則水草無法正常做生存所需的呼吸功能，宛如人類頸部被掐住無法呼吸一般，因此需要注意水質的管理，防止藻類滋生。
硝酸鹽濃度要低的話，建議飼養適量的小型魚，投入的飼料不可過量，如此可有效控制魚的拉便量，降低硝酸鹽含量，再配合換水，減少水中硝酸鹽，且飼料中多含”磷”，過量易增加藻類發生的機會。
◎迴避抗拒性的水草同植一處：
生物間的抗拒，有如人類的生存競爭，角頭爭佔地盤，人以刀、槍、體力為武力爭霸地盤，而水草分泌有害物質，使對方至無法生存的地步，因此紅色水草不適合與此類水草同植一處，如辣椒草屬及水蘭屬等。
is there any website that can translate all this into english?
it will be easier for alot of ppl to read..
I Doesnt haVe GReen HAIr NoR orANGE bodY. DOnT chOP mE likE A cARroT !!
I read the following article.
http://www.practicalfishkeeping.co.u...?article_id=41
In summary, what is written is that just like how we use sunblock to protect ourselves from exposure to too much (UV) light, certain plants use something called flaveniod, and this is what causes the plants to turn red.
Find out more from the article if you're interested.
i just got some rotalas sp 'Goias', but they came green. My friend says it was reddish initially but later turned green.
my lights are like 7W/gal but only the young shoots at the top are reddish. Beautiful enough to make me ask how to get the entire plant red.
so is 7W/gal enough? it's like 36x2 + 55 on a 2 ft tank. Should I pump in some additional supplements?
I also got some polygonums whose top leaves are more reddish.
Cheers,
Andrew
I have problem growing red plant in my tank. My green plant seems to grow well. But whenever I introduce red plant, it will just not grow and then die off. Is there any difference in terms of growing green and red plants? Like, lighting, CO2, PH or whatever. Anyone care to help?
Originally Posted by lorba
Typical wild plants live in places where the NO3 is like 0.1ppm NO3..........
Trying maintaining this level
They are quite correct about Fe though.....good CO2 and strong light together will produce good reds, but more broadly, any plant will grow better in that case............
I get excellent reds, as well as wild plants without strong light and CO2
So their school of thought certainly is far from "correct", but it's less to do with who is correct or not, rather........who is actually able to measure and make sure their notion about why the plant is red, is caused by what precisely.
Low NO3's will make weeds redder, but high PO4/NO3Traces/CO2 will as well if they are red plants, the other issue...............seeing a tank in person is the only real way to analyze how red a tank is, I have photoshop too.
Any photo is not a true representation.
Light temps, flash etc also play a role.
I see nothing wrong with their advice though...........it will help.
And it does address the Fe requirement for red plant myth, thank the lord
Someone is finally listening and not repeating the myth!
Regards,
Tom Barr
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