Sichuan Provincial Key Laboratory for Water saving Agriculture in the South of China

Chengdu, China

Sichuan Provincial Key Laboratory for Water saving Agriculture in the South of China

Chengdu, China
SEARCH FILTERS
Time filter
Source Type

Wu X.-L.,Sichuan Academy of Agricultural science | Tang Y.-L.,Sichuan Academy of Agricultural science | Tang Y.-L.,Sichuan Provincial Key Laboratory for Water Saving Agriculture in the South of China | Li C.-S.,Sichuan Academy of Agricultural science | And 2 more authors.
Acta Agronomica Sinica | Year: 2014

The growing condition for winter wheat is relatively unfavourable in Sichuan Basin due to less radiation in wheat growing season, drought stress at mid growing stage, and high temperature at late growing stage. Wheat cultivars in this area are commonly characterized with large grain weight and long filling period. Therefore, quality of grain filling is critical to final yield. The objective of this study was to understand the effects of genotypes and environments on characteristics of grain filling of wheat in Sichuan Basin. Ten representative cultivars were grown in three locations in 2010-2011 and 2011-2012 wheat growing seasons, and the dynamics of grain filling were observed. The average grain weight was 48.25 g over two years. There were three phases during grain filling, namely grain-filling pyramid period (T1), grain-filling fast increase period (T2), and grain-filling slowly increase period (T3). The durations were sequenced as T3 (16.30 d) > T1 (13.41 d) > T2 (12.98 d), and the grain-filling rates were 0.618, 0.772, and 2.205 mg grain-1 d-1, respectively. The contributions of biomass to grain were 21.21% in T1, 58.27% in T2, and 20.53% in T3. Clearly, about 80% of dry matter has been accumulated before T3 phase. In the same growing season, grain weight and grain-filling rates including maximum, (Rmax), mean (Rmean), and phase (R1, R2, and R3) rates of grain filling were mainly influenced by genotype, whereas other parameters for grain filling were mainly influenced by locations. Grain weight was significantly correlated with Rmean, Rmax, R2, and R3. Chuanmai 42, Chuanyu 23, and Chuanmai 56 were characterized with early anthesis, high grain filling speed, long time of grain filling, and large grain weight.


Tang Y.,University of Sichuan | Zhong B.,Genetic Improvement of Horticultural Crops Southwest Region | Zhong B.,Sichuan Provincial Key Laboratory for Water saving Agriculture in the South of China | Qu B.,University of Sichuan | And 5 more authors.
Environmental Science: Processes and Impacts | Year: 2017

A total of 28 groundwater, paired farmland soil, lettuce, and its rhizosphere soil samples were collected from Chengdu, China to detect perchlorate levels and to evaluate the relationships of perchlorate concentrations among these matrices. The perchlorate concentrations in the groundwater, farmland soil, lettuce, and rhizosphere soil samples ranged from below detection limit to 60.2 μg L-1, from below detection limit to 249 μg kg-1 dry weight (dw), from 2.07 to 1010 μg kg-1 wet weight, and from below detection limit to 314 μg kg-1 dw, respectively. Significant correlation was found in the perchlorate levels among the farmland soil, lettuce, and rhizosphere soil, suggesting that they have common pollution sources, or perchlorate might transfer from farmland soil-rhizosphere soil-plant. However, there is no significant correlation between groundwater and the other three matrices, indicating that infiltration from perchlorate contaminated farmland soil was not the predominant source for groundwater pollution in Chengdu. The perchlorate concentrations in the farmland soil and lettuce samples were significantly higher than those in the rhizosphere soil, primarily due to uptake of perchlorate through the rhizosphere micro-environment by lettuce, or accelerated degradation by rhizospheric microorganisms, which contributed more needs further investigation. © The Royal Society of Chemistry 2017.


Tang Y.,Crop Research Institute of Sichuan Academy of Agricultural science | Tang Y.,Sichuan Provincial Key Laboratory for Water saving Agriculture in the South of China | Wu X.,Crop Research Institute of Sichuan Academy of Agricultural science | Wu X.,Sichuan Provincial Key Laboratory for Water saving Agriculture in the South of China | And 5 more authors.
Plant Production Science | Year: 2013

A 7-year field experiment under a rice-wheat rotation system was conducted at Guanghan County in the Chengdu Plain of China from 2004 to investigate the long-term effect of different combinations of year-round tillage patterns and crop straw management on grain yield and quality of wheat. Treatments were rotary-till wheat + rotary-till rice without any straw (conventional treatment, CK), zero-till wheat with rice straw mulching + rotary-till rice with no wheat straw (WZRR), zero-till wheat with rice straw mulching + rotary-till rice with no wheat straw + autumn vegetable (WZRRV), zero-till wheat with rice straw mulching + zero-till rice with wheat straw mulching (WZRZ), and zero-till wheat with rice straw mulching + zero-till rice with wheat straw mulching under ridge-till (WRZB). There was little variation amongst years in grain yield and yield components with the treatment, while CK had lower yields in most years than other treatments with a slight decreasing trend; spike numbers per area had no significant change with the elapse of time. An obvious descending trend in grain number per spike and grains per area for CK and increase in 1000-grain weight for all treatments were observed; zero tillage and straw mulching improved wheat tiller ability, soil available nitrogen, phosphorus, and potassium contents at major growth stages, and leaf area index, SPAD, a portable chlorophyll meter reading, and dry matter at middle and late stages. Most grain quality traits of wheat were nearly the same in all treatments in all year-round tillage patterns.

Loading Sichuan Provincial Key Laboratory for Water saving Agriculture in the South of China collaborators
Loading Sichuan Provincial Key Laboratory for Water saving Agriculture in the South of China collaborators