Gardens and Parks

Woodball

This was a new one to me. I saw the course laid out at the Ayutthaya Historical Park and thought it looked similar to Park Golf. But where Park Golf involves hitting the ball into a hole, a woodball hole is completed when the ball passes through a gate.

Woodball course laid out on *Polytrias indica* in Ayuddhaya

A photo posted by Micah Woods (@asianturfgrass) on


This video explains the woodball rules.

Looks like fun.


Burning grass

2015年度の「芝焼き」

今年の「芝焼き」は青空で風も少しあったので、とても良い芝焼き日和でした。様々な節分の行事が岡山県内であったようですが、約900人の方がご来園でした。昨日の雨で土が湿っていたので、蒸気が上がりやすかったようです。

Posted by 岡山後楽園 on Tuesday, February 2, 2016

Korakuen in Okayama is one the three great gardens of Japan, and I like it especially because of its expansive noshiba (Zoysia japonica) lawns. In early February every year, a shiba yaki (grass burning) ceremony is held at Korakuen, when the lawns are burned.

The video above shows the ignition of a lawn. The Facebook page of Korakuen has more photos of the shiba yaki ceremony this year.

今日は「立春」、昨日の芝焼きを終えて春を迎える準備がととのってきた岡山後楽園です。これから焼けた芝を掃きます。真っ黒な芝をみるのは、また来年です。

Posted by 岡山後楽園 on Wednesday, February 3, 2016

It is pretty amazing how strange it looks before the lawns start to grow again.

【後楽園広報スタッフ奮闘記】2月2日~4日、御南中学2年生が後楽園で職場体験でした。みんなの感想を、3人が選んだ写真とともに掲載します。~御南中学職場体験~<Wさん>実は私は鳥が苦手で、近くに行くのも嫌でしたが、ここに来てとて...

Posted by 岡山後楽園 on Wednesday, February 3, 2016

For more about grass burning in Japan, see:



Botanizing in Bangkok

One of the best places to study tropical grasses in Southeast Asia is at the Suanluang Rama IX Public Park in Bangkok's Prawet District.

Lake_wat

The two primary species on lawns at Suanluang Rama IX are tropical carpetgrass (Axonopus compressus) in shaded areas and manilagrass (Zoysia matrella) in open areas.

Picnic_shade

If you visit the park you will notice that the carpetgrass forms a monostand under the trees, and at the edge of landscaped areas, but moving outside the drip lines of trees into areas that get more sun, the sward transitions to one dominated by manilagrass. In the photo below, one can see, just after sunrise, the manilagrass in the center of the photo holds more dew than does the carpetgrass.

Zoysia_sun

This year in April, a new medicinal plants garden was established in the northern part of the park.

Entrance_sign

Medicinal plants are interesting, but what I found really exciting when I had a chance to explore this new garden is that there are much more than just medicinal plants there. In fact, there is an extensive grass collection, the largest I have seen in Southeast Asia.

Grasses_sign1

For mown turfgrasses in zone 14 of the medicinal plants garden, one can see:

  • 2 types of Zoysia
  • 3 types of Cynodon
  • Paspalum vaginatum
  • Axonopus compressus
  • Stenotaphrum secundatum 'Variegatum'

Ornamental

There are more ornamental and forage grasses and grains than turfgrasses -- rice, sudan grass, maize, sugar cane, and scores of others.

Pennisetum

One can find common ornamental grasses such as Pennisetum setaceum 'Rubrum', along with a lot that I saw for the first time.

Basil

In the new medicinal plants garden one can also find herbs and vegetables, and in other sections of the park there are also vegetable and herb gardens for educational purposes.

A highlight of the year is the Suanluang Rama IX Flower Festival, held from December 1 to 10 each year. I've been to this festival a few times, and the 2015 version seems the best one yet. There are even grass elephants!

Elephants

These displays of horticultural art during the flower festival are reminiscent of the Girona Temps de Flors. If you can't make it for the flower festival in early December, there are still plenty of other plant collections that remain open year round. The fern and orchid houses are in a deeply shaded section of the park.

Fern

But back to the grass. As I mentioned, if you see the lawns at the park, they are primarily composed of tropical carpetgrass, as seen above in front of the fern and orchid houses, and below under the trees.

Lawn

In some less shaded areas, the primary species is manilagrass. The species composition at Suanluang Rama IX park in Bangkok is the same as I've described for the lawns at the Marukatayawan Palace. One can also find Java grass (Polytrias indica) growing in patches around the park. It is usually, as shown below, found within patches of manilagrass. Polytrias indica has an inflorescence that is russet in color and this species forms a distinctive component of the sward because of this coloration.

Polytrias_indica

One can also find Chrysopogon aciculatus and Paspalum conjugatum mixed in with the Axonopus compressus in some places. The leaf characteristics of those three species are similar, and it is only obvious that all three species are present when the plants are flowering. These grasses on the lawns at Suanluang Rama IX park and in the grass collection of the new Medicinal Plants Garden are typical of the grasses that grow and are used in South and Southeast Asia. Well worth some study if you care about these things.

Even if you don't care much for botany or agrostology or grass elephants, I would still recommend a visit. This is the freshest air in the city and the park is popular for running, walking, cycling, boating, birding, tai chi, yoga, and aerobics.

Eto_jog


Bangkok's Best Park, Algae, and Phosphorus

Victoria_amazonica_rama_ix_bangkok

This afternoon I was at my favorite park in Bangkok, the King Rama IX Park. This park is near my residence and when I am in Bangkok I frequently go to this park in the early morning or late afternoon for jogging. Today I noticed a lot of algae growing in the ponds —see above the clean water amongst the Victoria amazonica lilies and the algae everywhere else — and was reminded of three things I wanted to share about phosphorus, and phosphorus fertilizer applied to turfgrass in particular. 

1. Phosphorus is essential for food production, is a limited resource, and common sense tells us that we should not apply it to turf if it is not absolutely necessary. Earlier this year I read an interesting article in Foreign Policy entitled Peak Phosphorus. The authors argue that "our dwindling supply of phosphorus, a primary component underlying the growth of global agricultural production, threatens to disrupt food security across the planet during the coming century. This is the gravest natural resource shortage you've never heard of."

I can assure you, if there is adequate phosphorus in the soil, adding more will have no beneficial affect to the turf. How can you tell if phosphorus is necessary? By a routine soil analysis. I use 35 parts per million (ppm) phosphorus on a Mehlich 3 soil test as a conservative threshold level for deciding whether phosphorus fertilizer is required or not. If you are applying fertilizer without doing a soil test, you are probably wasting money and over-applying phosphorus. And if you are applying phosphorus fertilizer to turfgrass growing on soil that has 35 ppm phosphorus or more, you may as well shred money and apply that to the grass. The effect on the turf will be the same.

2. Back to the algae in the water at the Rama IX Park, that algae would not be growing if there was not phosphorus in the water. Phosphorus is usually the limiting factor in algal blooms (eutrophication) of water bodies. Adding phosphorus to turfgrass when that phosphorus is not needed will increase the risk of polluting nearby water bodies and will have no effect on the grass.

3. People ask me how to prevent algae from growing on putting greens. There are a number of techniques to employ, but an essential one is to avoid unnecessary applications of phosphorus. Dr. John Kaminski, Director of the Golf Turf Management Program at Pennsylvania State University, has done research on creeping bentgrass turf during summer conditions to evaluate the effect of different fertilizers on algae. In summary, the results have shown that applying nitrogen only (particularly ammonium sulfate, 21-0-0) prevents algae, while adding phosphorus causes a tremendous increase in algae. From a paper Kaminski published in the International Turfgrass Society Research Journal, there was no algae (0%) in plots fertilized through the summer with ammonium sulfate. A complete fertilizer containing phosphorus (20-20-20) always had algae and in some cases more than 20% of the surface area was covered by algae rather than grass. If you often have an algae problem on your greens, you may want to reevaluate your phosphorus fertilization program.

P.S. At the time I wrote this post in 2010, I was using 35 ppm for P. After the development of the MLSN guidelines, I use them instead, and as of 2016 I'd work with a minimum P level by the Mehlich 3 test of 21 ppm.