Introduction of rhododendron species-- sheep hesitant
It belongs to the subgenus Rhododendron. Deciduous shrubs, 0.5-2 m tall. The branchlets are soft and thin. Pilose and bristles. The leaves are papery, light green, long elliptic-lanceolate, 5-12 cm long and 2-4.5 cm wide, apex obtuse, with a convex tip, base cuneate, margin ciliate, petiole, leaf surface, and leaf back all pilose. Terminal racemose umbel, with 5-9 flowers, blossoms in early May, about 10 days later than Yingshanhong, flowers first and then leaves or flowers and leaves together, Corolla wide bell-shaped, caliber 5-6 cm, golden yellow to orange, tail light green, bright and eye-catching. Stamens 5, pilose at base, style smooth; ovary 5-loculed, pilose. Capsule Terete, mature from September to October.
This species is found in shrubs on hillsides below 2000 meters in Jiangsu, Zhejiang, Anhui, Jiangxi, Hunan, Hubei, Fujian, Guangdong, Guizhou and other provinces. Because the whole plant is poisonous and poses a threat to livestock, it is rarely cultivated in East China, but its golden flowers and green leaves are very special in Yingshanhong community. proper collocation can add color to the landscape. There are 18 species made in the United States, but their hybrid compatibility, seed setting rate, germination rate, cold tolerance and stress resistance are not as good as those of the Chinese species. The yellow flower heredity of rhododendron is recessive in the hybrid generation and is of great value in breeding, so it is still used as a hybrid parent in the United States. At present, many yellow rhododendrons of the same kind have been bred in the world. So far, this kind of wild species has not been found in Yunnan, China, but there is a long and extensive distribution of cultivated species, with large plants, first leaves before flowers, and large and dense flowers. With golden color and red halo, it is the most beautiful horticultural variety of this kind, which is most cultivated in Dali, Baoshan, Tengchong and Lijiang.
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Closed cuttage propagation of rhododendron
First, the selection and construction of the slotting bed should be built in the place of leeward, shade and water. Covered with black shading net (60% to 70% shading rate), both sides of the shading net should be hung to the ground, so that the whole shed is in a cool environment. There is no small arch shed on the seedbed, and the center of the arch shed is 40 centimeters high. Cover with a layer of plastic film and then a layer of black shading net (60% to 70% shading rate). Second, lay the substrate in early May, mix rotten leaf soil and perlite (1 ∶ 1) evenly in the seedbed, the thickness should not be less than 30 cm. Put it
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Management of rhododendron after flowering
After pruning and plastic rhododendron blooming, it is generally necessary to manually remove the residual flowers, and then carry out appropriate thinning, cut off the dense branches and let them re-branch. Fertilizer and water management in northern China, the water is alkaline and hard. Long-term watering of flowers is easy to cause soil Alkalization and affect the growth of flowers. Therefore, the water should be stored in a container for more than 24 hours before watering, and then used after chlorine volatilization. It can also be watered every 10 days or so with the right amount of ferrous sulfate or edible white vinegar. Cuckoos do not need much fertilizer, they usually apply fertilizer with water, so they can
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