Phyllostachys aureosulcata f. spectabilis

Phyllostachys aureosulcata f. spectabilis

Phyllostachys aureosulcata (scientific name: < iphyllostachys aureosulcata < / imclure 'spectabilis') is a variety of Bambusa flavescens of Gramineae. The stem is 4-10m high and 2-5cm in diameter. The new culm of Hsinchu is tender yellow, and then gradually golden yellow. There are green longitudinal stripes in each node, green stripes in some rhizomes, green leaves and yellow and white stripes in a few leaves. The bamboo is bright, yellow and green, so it is called Jinxiangyu. The lower part of some culms is zigzag. The shoot period is from mid April to early May, and the flowering period is from May to June.

Bamboo with jade inlaid with gold is a treasure of bamboo. Its rarity lies in the tender yellow bamboo pole. At each branch and leaf, it naturally forms a green shallow ditch, and its position is crisscross. At a glance, it looks like gold bars inlaid with Jasper, so it is called "gold inlaid with blue inlaid with bamboo" in ancient Haizhou annals.

It is cultivated in Beijing, Jiangsu and Zhejiang of China. This species is mainly used for ornamental because of its beautiful color.

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morphological character

The culm is golden yellow, up to 9 meters high and 4 cm thick. There are 2 or 3 segments at the base of the thinner culm, often zigzag. The young culm is covered with white powder and pubescence. The surface of the culm is slightly rough when the hairs fall off. The internodes are 39 cm long and the grooves are green. The culm ring is moderately raised, higher than the sheath ring. Sheath dorsal purple green, often with light yellow longitudinal stripes, scattered Brown small spots or no spots, covered with thin white powder; sheath ear pale yellow with purple or purple brown, from the base of sheath to both sides of the extension, or with sheath top obviously connected, with trichomes on the edge; sheath tongue wide, arched or truncated, purple, with thin short white cilia on the edge; sheath triangular to triangular lanceolate, erect or developed Or valgus on sheath of lower part of culm, straight or sometimes undulate.

Terminal branchlets 2 or 3-leaved; auricles minute or absent, trichomes short; ligule extended; leaf blade ca. 12 cm long, 1.4 cm wide, base contracted into petioles 3-4 mm long. The flower branches are spicate, 8.5cm long, with 4 gradually enlarged scalelike bracts at the base; the spathe bracts are 4 or 5, glabrous or sparsely pubescent, without auricles and glandular trichomes, and the reduced leaves are conical, with 5-7 pseudospikelets in each spathe, but the lowest spathe usually does not have pseudospikelets. Spikelets with 1 or 2 florets; rachis hairy; glumes 1 or 2, ridged; lemma 15-19 cm long, pilose in middle and upper parts; palea slightly shorter than lemma, pilose in upper part; perianth 3.5 mm long, ciliate at margin; anthers 6-8 mm long; stigma 3, feathery. The shoot period is from mid April to early May, and the flowering period is from May to June.

Habitat of producing area

It is cultivated in Beijing, Jiangsu and Zhejiang of China.

Jinxiangyuzhu is fond of acid loam which is sunny and leeward, deep, fertile, moist, good drainage and air permeability, and the pH value is 4.5-7. It can grow at - 20 ℃.

Methods of reproduction

Jinxiangyuzhu has the advantages of strong ability to shoot, wide adaptability, easy planting and fast growth. The bamboo shoots grow in April, from June to July, from August to October, and grow slowly from November to February. Therefore, in addition to the period of shooting in April, the other time can use the mother bamboo transplanting method. The selection of nursery land requires fertile and moist sandy loam with good drainage, convenient transportation, sufficient water source, easy irrigation and transportation, flat slope and deep soil layer.

The selection and transportation of mother bamboos jinxiangyuzhu belongs to small and medium-sized scattered bamboos. In afforestation and landscaping, the mother bamboos with 2-3 years old, strong growth, low branching habit, small culm diameter, luxuriant branches and leaves, and no diseases and pests should be selected. The soil balls with a diameter of 30-35 cm and a whip length of 10 cm and a whip length of 15 cm should be left when digging the mother bamboo. When taking bamboo, do not shake the bamboo stalk to avoid damaging the "screw" on the whip. Because the individual is short, in order not to affect the ornamental effect, the shoot should not be removed, but 2 / 3 of the bamboo leaves should be removed. In the long-distance transportation process, the mother bamboo is wrapped with straw rope and packing bag, covered with straw or tarpaulin, and sprayed with water to keep moisture. The main technical points are as follows: one month before the bamboo shoots are unearthed, the average temperature is above 15 ℃. First, the nursery should be arranged. According to the planting density of 1 m × 1.2 m, the ditch should be dug. The bottom of the hole should be flat. The bottom of the ditch should be applied with rotten manure and fertile soil. The size of the hole is 50 cm × 50 cm × 60 cm. When planting bamboo, it should be placed with care. When filling soil, it should be pressed with care, and sufficient water should be poured to fix the root. Cover weeds or bamboo leaves around bamboo shoots to reduce water evaporation. In 2-3 years, Hsinchu can be released from the nursery.

cultivation techniques

Planting time: generally, before and after the Spring Festival (winter and early spring) is a better planting season. In case of low temperature or freezing weather in early spring, planting can be postponed to March. If it is necessary for landscape engineering construction, it can be planted before rain in summer with abundant rainfall, and the survival rate is also high. The selection and transportation of bamboo seedling are the same as that of mother bamboo.

Soil and soil preparation: jinxiangyuzhu likes acid loam with deep, fertile, moist, good drainage and air permeability, and the pH value is 4.5-7. If the alkaline soil or construction waste is thick, the afforestation land should be improved, and the landscaping land should be properly cleaned and covered with a layer of loess. Dig the soil deeply, remove the debris and level the land. The size of the planting hole depends on the size of the mother bamboo soil ball, and the general hole digging specification is 40 cm × 40 cm × 60 cm.

Planting density: according to the planting density of 3 m × 3 m, strengthen the management, and it will be basically closed after 3 years. If it is used as the main landscape piece planting or group planting, the spacing between plants and rows can be selected as 80 cm × 120 cm, so as to achieve immediate planting and landscape formation; if it is used as hedgerow, the spacing between plants and rows can be selected as 50 cm × 60 cm; if it is used as landscape matching and embellishment, it is sparse and free, depending on the situation. The key point of planting is to first spread a layer of mixed soil and miscellaneous fertilizer or decomposed organic fertilizer on the bottom of the hole, and pad 15 cm thick loose soil. When planting, remove the binding materials such as straw rope, put them into the hole, fill and step on the soil, make the soil ball closely connected with the soil, pour water, and then cover with a layer of loose soil after the water infiltrates. The depth of covering soil is 2 cm higher than that of the original mother bamboo.

Watering and drought resistance: if the leaves of newly-built bamboo forest lose their green and turn yellow in midsummer and drought season, they should be watered sooner or later to keep moisture. In order to ensure the survival rate and seedling growth of the new bamboo forest, a large amount of water is needed in the shoot stage.

Weeding and fertilization: the newly planted bamboo garden has sparse plants, and the woodland is sunny, so weeds are easy to grow. If we do not weed in time, it will directly affect the growth of new bamboo. June to September is the growing season of weeds. After each weeding, each female bamboo should be topdressed with 0.1-0.2kg compound fertilizer and properly cultivated. Fertilization can make the leaves dark green and increase the ornamental value.

Pruning: it is necessary to prune properly in order to keep good shape, vigorous growth and prevent diseases and insect pests. According to the requirements of landscape construction, it is usually pruned in the growing period.

Main value

The bamboo with gold inlaid jade is mainly for viewing because of its beautiful color.

Jinxiangyuzhu is one of the four famous bamboos in China. Its rarity lies in the tender yellow bamboo pole. At each branch and leaf, there is a green shallow ditch. It is as green as jade, and its position is crisscross. At a glance, such as the root of gold inlaid with pieces of Jasper, elegant and lovely, hence the name of gold inlaid jade bamboo.

Plant culture

In 1993, China's national postal department issued a set of 4 bamboo stamps, the second of which is the top grade bamboo with gold inlaid jade.

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