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Zhengzhou, China

Ding X.,Henan Academy of Forestry | Su F.,Wuhan Forestry and Fruit Tree Research Institute | Tang D.,Huazhong Agricultural University
Acta Horticulturae | Year: 2013

As one of the three major persimmon producing areas in China, more than 550,000 mu (about 36,667 hectare) persimmon are cultivated in Henan Province. And the production of persimmon is 140,000 t per year, mainly in Luoyang, Nanyang, Anyang, Xinxiang, Jiaozuo and Pingdingshan City. We investigated the persimmon resources, processed products development and some Japanese pollination-constant non-astringent (PCNA) persimmon cultivars which have been introduced into Henan Province in recent years. The main problems including variants are complex, production instability, lack of intensification cultivation, scattered planting, imperfect marketing system, not-yet-become industrialization development, insufficient persimmon storage and deep processing. 'Jinshi', 'Xin'an-niuxinshi', 'Boaibayuehuang' and 'Xingyangshuishi' are the representative astringent persimmon cltivars in Henan Province.

Ding X.,Henan Academy of Forestry | Chen Z.,Forestry Bereau of Dengzhou County | Liu X.,Henan Agricultural University
Acta Horticulturae | Year: 2013

The persimmon (Diospyros kaki L.) is native to China, with a long cultivation history and rich resource types. Persimmon trees in China grow from the north to the south because of their strong adaptability. The Chinese persimmon trees live in complex habitat, and the cultivation and management are relatively extensive, so diseases are quite common. The main diseases on Chinese persimmon trees include persimmon anthracnose, persimmon cercospora leaf spot, persimmon circular leaf spot, persimmon powdery mildew, persimmon madness and so on. This paper introduces the main diseases above mentioned, including pathogenic characteristics and symptoms, pathogen, epidemicity, and finally some integrated control strategy is discussed.

Han D.,Pingdingshan Forestry Technology Extension Station | Ding X.,Henan Academy of Forestry
Acta Horticulturae | Year: 2013

Persimmon is highly localized in Pingdingshan region, central China which is abundant in cultivar resources, various processing and utilization, and long time of persimmon supply. The fruit culture and resource utilization of persimmon are similar to the original planting method which makes it vary a lot between cultivars in this region. The preliminary survey suggests that there are 42 cultivars or types in this region, 19 of them are fine cultivars which have unique advantages and condition to develop cultivar breeding selection, good gene research, resource development and utilization.

Bai B.,Nanjing Agricultural University | Yang H.,Henan Academy of Forestry | Fan W.,Henan Academy of Forestry | Bian X.,Nanjing Agricultural University
Shengtai Xuebao/ Acta Ecologica Sinica | Year: 2010

Along with the development of urbanization and the improvement of people's living standard, the domestic sewage is dramatically increased through time, resulting in serious environmental deteriorating in the water body. In order to decrease the pollution of surrounding water environment, the sewage treatment approaches through lands have been developed quickly and widly used. One of the most successful method is the slow filtering eco-treatment system, which lets sewage to go through the land planted with vegetation so that the sewage can be purified via flowing through the soil system. However, due to the high NaCl content in the domestic sewage, this treatment method may bring negative effects on the soil and plant. Accordingly, the hydraulic loading rate is the key parameter in slow filtering eco-treatment for the health of soil system and plant growth. To get a scientific and rational hydraulic loading rate is critical for sewage dispose and usage in land system. Therefore, our objectives are to evaluate the impacts of sewage through slow filtering eco-treatment system on soil properties and poplar growth, as well as to choose a suitable hydraulic loading rate for poplar plantation. The slow filtering eco-treatment system for sewage treatment was carried out with five hydraulic loading rates (0, 3, 6, 9, 12, 15 cm/week) from 2008 to 2009 in Longhu town, Zhengzhou City, China. The aboveground biomass growth and the physicochemical properties of topsoil (0-40 cm) and subsoil (40 -100cm) were investigated during the experiment duration. Eight soil properties were investigated, such as soil organic carbon (SOC), soil nitrogen (N), soil phosphorus (P) and soil potassium (K) and etc. In order to simplify the comparison of the differences in soil characteristics, an comprehensive quality index (QI value) was used for topsoil layer, while the subsoil properties were analyzed with the single soil physicochemical property. Our results showed significant differences in the effects of loading rates on soil quality and poplar growth. The QI value of topsoil and the poplar aboveground biomass increased along with the hydraulic loading rate increasing between the rates of 3 to 9 cm/week, and reached the maximum at 9 cm/week. When hydraulic loading rate outpaced 9 cm/week, the topsoil QI value and the poplar aboveground biomass growth decreased along with the increased hydraulic loading rate. There existed significant positive correlation between topsoil QI value and the poplar aboveground biomass growth, indicating the topsoil QI value representing soil fertility change. Sewage disposal had little impacts on the subsoil properties as hydraulic loading rate below 9 cm/week but produced harmful effects on subsoil properties as hydraulic loading rate above 9 cm/ week. The higher sodium ion contents in topsoil and subsoil were one of the main reasons to the reduction of soil quality and poplar aboveground biomass growth. According to above results, the slow filtering eco-treatment of sewage obviously impacts soil properties and poplar aboveground biomass growth. The soil properties change is significantly correlated with the poplar growth. And the suitable hydraulic loading rate for domestic sewage treatment by poplar land is 6 - 9 cm/week.

Qirui W.,Henan Academy of Forestry | Jun G.,Research Institute of Forestry
Applied Mechanics and Materials | Year: 2012

Measured the cover soil water content in soil layer 0~30cm of different agroforestry landscape types in Jinghe river with TDR, the landscape types including sloping cropland, apple orchard, apple-clover system, land under forest and grass changed from grain crop and black locust forest. Analyze the distribution characteristic and spatiotemporal variability of the cover soil water. The result showed that the soil water has renewed in a certain extent after a rain period in 1.5 m soil profile; the soil water content is gradually increased from the top of to the bottom of the slope under the affection of the slope location and plant category. The theory model of semivariogram for cover soil water content before rain season and after season, the value of nugget is changed no obviously, and they are 0.25 and 0.30; ranges is 99.7 m and 87.6 m. And the results indicated that soil moisture exhibited high fractal dimensions and clear spatial autocorrelation. The fractal dimensions are 1.71 and 1.74, variogram is main autocorrelation. During rain season the theory semivariogram model is linear, the spatiotemporal variability of soil water content becomes higher with the increase in distance, and its fractal dimension is 1.40. © (2012) Trans Tech Publications, Switzerland.

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