Plant Protection and Quarantine Station of Gansu Province

Lanzhou, China

Plant Protection and Quarantine Station of Gansu Province

Lanzhou, China

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An L.,CAS Lanzhou Cold and Arid Regions Environmental and Engineering Research Institute | Xie Z.,CAS Lanzhou Cold and Arid Regions Environmental and Engineering Research Institute | Wang M.,Plant Protection and Quarantine Station of Gansu Province | An L.,Lanzhou University | And 6 more authors.
Philippine Agricultural Scientist | Year: 2010

Dormancy in lily (Lilium sp.) bulbs is broken by a cold period of several weeks. Sprouting percentage, growth and flower quality are reduced when bulbs are partially released from dormancy. To understand the involvement of phytohormones in dormancy release in lily bulbs, the concentration of endogenous abscisic acid (ABA), gibberellic acid (GA 3), zeatin (ZT) and 3-indoleacetic acid (IAA) was examined in the primary shoot, outer scale and root of bulbs of Oriental hybrid Lilium 'Siberia' during the dormancy release period. Cold treatment (4 °C) enhanced ABA, GA3 and ZT concentration in the primary shoot. GA 3, ZT and ABA reached their maximum levels on the 14 th, 49 th and 63 rd days of cold storage, respectively. IAA concentration remained at a constant level in the primary shoot of bulbs at 4 °C up to 21 d. Thereafter, it increased gradually up to the maximum level on the 84 th day. In the outer scale of the bulbs, GA3 increased dramatically on the 7 th day, then declined till the end of the 4 °C treatment. In the root, GA 3 was at a higher level in the bulbs at 4 °C than at 25 °C treatment before 42 d. The ratios of phytohormone that promote plant growth to phytohormone that inhibit plant growth were higher in the outer scale of the bulbs at 4 °C than those at 25 °C treatment before 42 d. The ratios were lower in the primary shoot of the bulbs after 42 d of the 4 °C treatment than those at 25 °C. In conclusion, cold treatment enhanced ABA, GA3 and ZT concentration and effectively regulated IAA concentration to reach the maximum level at the end of dormancy release period in the primary shoot of bulbs under 4°C treatment. Apparently, changes in ABA and GA 3 concentration differ in the primary shoot, outer scale and root of the bulbs of lily. These changes act as multipurpose signals in the control of bulb dormancy release in the different tissues of the bulb and during the different stages of bulb development. Apparently, there is a relationship between ABA and IAA concentration and bulb sprouting.


Chen L.-J.,CAS Lanzhou Cold and Arid Regions Environmental and Engineering Research Institute | Feng Q.,CAS Lanzhou Cold and Arid Regions Environmental and Engineering Research Institute | Li F.-R.,CAS Lanzhou Cold and Arid Regions Environmental and Engineering Research Institute | Li C.-S.,Plant Protection and Quarantine Station of Gansu Province
Geoderma | Year: 2015

A mathematical model for simulating soil water and salt transfer under mulched furrow irrigation with saline water was presented. The model performance was evaluated by comparing the simulated values with observed data from the field experiment. The results demonstrated that the model performed reliably in the simulation of water and salt transfer under field conditions. In addition, the model was also used to simulate the process of soil water and salt transfer after saline water irrigation. The simulation demonstrated that the increment of soil water storage below the bottom of the furrow was nearly equal to the value below the top of the ridge immediately after the end of the irrigation (17. h) when the downward movement of irrigation water was restricted by the clay interlayer in soil. However, during the irrigation interval (192. h and 384. h after the irrigation), more water was maintained below the top of the ridge due to a considerable reduction of evaporation under mulched furrow irrigation. Soil salt mainly comes from saline water irrigation and the soil salt below the top of the ridge mainly increased at the redistribution phase (17. h). During the irrigation interval, soil conductivity in surface soil layer below the top of the ridge was smaller than that below the bottom of the furrow, which indicated that the distribution of soil salt below the top of the ridge was more uniform than below the furrow. The model presented here offers an efficient approach to estimate environmental effects of mulched furrow irrigation technology associated to saline water utilization. © 2014 Elsevier B.V.


Zhai X.-W.,Chinese Academy of Agricultural Sciences | Zhai X.-W.,Shandong Agricultural University | Liu W.-X.,Chinese Academy of Agricultural Sciences | Zhang G-F.,Chinese Academy of Agricultural Sciences | And 3 more authors.
Chinese Journal of Applied Ecology | Year: 2010

Codling moth Cydia pomonella L. (Lepidoptera, Olethreutidae) is the most serious pest of orchards, and one of the most important quarantine pests in China. This paper studied the effects of the color, shape, placement location, lure color, and lure number of sex pheromone traps on the capture efficacy for C. pomonella L. male moth. It was found that the capture efficacy of white and green traps was two times higher than that of blue trap (P < 0. 05), and water bottle and triangle traps had no significant difference in their trapping effect. The traps hung in the middle of crown gave two times higher catches than those hung in the upper portion of crown (P <0. 05) . Lure color and number had no significant effect on the capture efficacy. The present results could be used in better monitoring C. pomonella by using its sex pheromones.


Chen L.-J.,Chinese Academy of Sciences | Chen L.-J.,University of Queensland | Feng Q.,Chinese Academy of Sciences | Wei Y.-P.,University of Queensland | And 4 more authors.
Journal of Soils and Sediments | Year: 2016

Purpose: Irrigation and fertilization can change soil environment, which thereby influence soil microbial metabolic activity (MMA). How to alleviate the adverse effects by taking judicious saline water irrigation and fertilization regimes is mainly concerned in this research. Materials and methods: Here, we conducted a field orthogonal designed test under different saline water irrigation amount, water salinity, and nitrogen fertilizer application. The metabolic profiles of soil microbial communities were analyzed by using the Biolog method. Results and discussion: The results demonstrated that irrigation amount and fertilizer application could significantly change MMA while irrigation water salinity had no significant effect on it. Medium irrigation amount (30 mm), least (50 kg ha−1) or medium (350 kg ha−1) N fertilizer application, and whatever irrigation water salinity could obtain the optimal MMA. Different utilization rates of carbohydrates, amino acids, carboxylic acids, and polymers by soil microbial communities caused the differences of the effects, and D-galactonic acid γ-lactone, L-arginine, L-asparagine, D-glucosaminic acid, Tween 80, L-threonine, and D-galacturonic acid were the indicator for distinguishing the effects. Conclusions: The results presented here demonstrated that by regulating irrigation water amount and fertilizer application, the effects of irrigation salinity on MMA could be alleviated, which offered an efficient approach for guiding saline water irrigation. © 2016 Springer-Verlag Berlin Heidelberg


Chen L.-J.,CAS Lanzhou Cold and Arid Regions Environmental and Engineering Research Institute | Feng Q.,CAS Lanzhou Cold and Arid Regions Environmental and Engineering Research Institute | Li C.-S.,Plant Protection and Quarantine Station of Gansu Province | Song Y.-X.,Gansu Agricultural University | And 3 more authors.
Environmental Management | Year: 2016

Spatial variations of soil microbial activities and its relationship with environmental factors are very important for estimating regional soil ecosystem function. Based on field samplings in a typical saline groundwater-irrigated region, spatial variations of soil microbial metabolic activities were investigated. Combined with groundwater quality analysis, the relationship between microbial activities and water salinity was also studied. The results demonstrated that moderate spatial heterogeneity of soil microbial activities presented under the total dissolved solids (TDS) of groundwater ranging from 0.23 to 12.24 g L−1. Groundwater salinity and microbial activities had almost opposite distribution characteristics: slight saline water was mainly distributed in west Baqu and south Quanshan, while severe saline and briny water were dominant in east Baqu and west Huqu; however, total AWCD was higher in the east-center and southwest of Baqu and east Huqu, while it was lower in east Baqu and northwest Huqu. The results of correlation analyses demonstrated that high-salinity groundwater irrigation had significantly adverse effects on soil microbial activities. Major ions Ca2+, Mg2+, Cl_, and SO4 2− in groundwater decisively influenced the results. Three carbon sources, carbohydrates, amines, and phenols, which had minor utilization rates in all irrigation districts, were extremely significantly affected by high-salinity groundwater irrigation. The results presented here offer an approach for diagnosing regional soil ecosystem function changes under saline water irrigation. © 2016 Springer Science+Business Media New York


Chen L.-J.,CAS Lanzhou Cold and Arid Regions Environmental and Engineering Research Institute | Feng Q.,CAS Lanzhou Cold and Arid Regions Environmental and Engineering Research Institute | Li F.-R.,CAS Lanzhou Cold and Arid Regions Environmental and Engineering Research Institute | Li C.-S.,Plant Protection and Quarantine Station of Gansu Province
Agricultural Water Management | Year: 2014

Here, we present a mathematical model for simulating both soil water flow and salt transport in two directions (perpendicular and parallel to the drip tubing) under mulched drip irrigation with saline water. We evaluated the effectiveness of this model by comparing the simulated values with observed data from the field experiment (one treatment with three replications was imposed with irrigation water electrical conductivity of 4.0dSm-1 and amounts of 2400m3ha-1 under mulched drip irrigation system). The results demonstrated that the model performed reliably in the simulation of water flow and salt transport under field conditions. In addition, the model was also used to simulate the spatial distribution patterns of soil water and salt in the two directions in relation to different treatments of irrigation quantity and quality. The simulation demonstrated that the volume of wetted soil was affected by both the plastic mulching and irrigation amount. The wetted region was expanded to the middle of the plastic mulching when the irrigation amount was high and the uniformity of irrigation increased with increasing irrigation volume. Soil water content in the direction parallel to the drip tubing was higher than that perpendicular to the tubing at the same distance, indicating that the wetting fronts overlapped more rapidly in the direction parallel to the drip tubing. The soil salt concentration was high at the edges of the wetting front, with a fairly large desalinated area immediately underneath and adjacent to the drippers. The model presented here offers an efficient approach to investigating the mechanisms underlying soil water flow and salt transport and for designing mulched drip irrigation systems with saline water. © 2014 Elsevier B.V.


PubMed | CAS Lanzhou Cold and Arid Regions Environmental and Engineering Research Institute, Gansu Agricultural University and Plant Protection and Quarantine Station of Gansu Province
Type: Journal Article | Journal: Environmental management | Year: 2016

Spatial variations of soil microbial activities and its relationship with environmental factors are very important for estimating regional soil ecosystem function. Based on field samplings in a typical saline groundwater-irrigated region, spatial variations of soil microbial metabolic activities were investigated. Combined with groundwater quality analysis, the relationship between microbial activities and water salinity was also studied. The results demonstrated that moderate spatial heterogeneity of soil microbial activities presented under the total dissolved solids (TDS) of groundwater ranging from 0.23 to 12.24 g L(-1). Groundwater salinity and microbial activities had almost opposite distribution characteristics: slight saline water was mainly distributed in west Baqu and south Quanshan, while severe saline and briny water were dominant in east Baqu and west Huqu; however, total AWCD was higher in the east-center and southwest of Baqu and east Huqu, while it was lower in east Baqu and northwest Huqu. The results of correlation analyses demonstrated that high-salinity groundwater irrigation had significantly adverse effects on soil microbial activities. Major ions Ca(2+), Mg(2+), Cl(-), and SO4(2-) in groundwater decisively influenced the results. Three carbon sources, carbohydrates, amines, and phenols, which had minor utilization rates in all irrigation districts, were extremely significantly affected by high-salinity groundwater irrigation. The results presented here offer an approach for diagnosing regional soil ecosystem function changes under saline water irrigation.

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