作者机构:
湖南农业大学生物科技与技术学院,长沙410128;农业部华中地区作物栽培科学观测实验站,长沙410128;湖南省作物多熟制工程技术研究中心,长沙410128;湖南农业大学农学院,长沙410128;[黄璜; 郑华斌] Observation Station of Crop Cultivation Science in Central China, Ministry of Agriculture, Changsha, 410128, China, Hunan Engineering Research Center for Crop Multiple Cropping, Changsha, 410128, China, College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
通讯机构:
[Huang, H.] O;Observation Station of Crop Cultivation Science in Central China, Ministry of Agriculture, Changha, China
作者机构:
[Li, Diqin] College of Agronomy, Hunan Agricultural University, Changsha, 410128, China;Observation Station of Crop Cultivation in Central China, Ministry of Agriculture, Changsha, 410128, China;[Li, Xumeng] College of Science, Hunan Agricultural University, Changsha, 410128, China;[Chen, Can; Zheng, Huabin; Huang, Huang; Fu, Zhiqiang] College of Agronomy, Hunan Agricultural University, Changsha, 410128, China, Observation Station of Crop Cultivation in Central China, Ministry of Agriculture, Changsha, 410128, China
通讯机构:
[Huang Huang; Diqin Li] C;College of Agronomy, Hunan Agricultural University, Changsha, China<&wdkj&>Observation Station of Crop Cultivation in Central China, Ministry of Agriculture, Changsha, China<&wdkj&>College of Agronomy, Hunan Agricultural University, Changsha, China
关键词:
Economy;Energy;Intermediate-type technology;PSI;Traditional farming technology in China
摘要:
Introduction: Modern intensive rice production has brought a large amount of environmental pollution and do not guarantee the safety of rice quality. Thus, to improve the farmer's rice production model to reduce agro-chemicals is of great importance to decrease pollution and to guarantee the security of food quality. Here, our experiments illustrated that nomadic rice-duck complex ecosystem (RD) could reduce energy input and increase both energy output and the values of the product safety index based on energy (PSI).
摘要:
Canopy light distribution and photosynthesis modeling is fundamental to cereal crop cultivation, breeding and crop informatics. It also has a great theoretical and practical significance for the evaluation and optimization of plant types and computer simulations of crop growth. This study has developed a cereal crop canopy photosynthesis model based on the improved "stratified-clipping method", which combines morphology, physiology and optics. This model includes a canopy shape model, a single leaf photosynthesis rate model, a canopy light distribution model and a photosynthetic rate model. In this study we carried out a numerical simulation of the photosynthetic rates of the 15625 rice plant types. The numerical results showed that the photosynthesis rate was closely related to the following five factors: leaf density, leaf nitrogen content, leaf length, leaf width and leaf angle. The model led us to the conclusion that the ideal rice plant type has large values around the vectors for the five factors in the upper part of the canopy, but should decreases downwardly along the canopy.
摘要:
The trace of high and low ridge in the Sanyangzhuang village site showed that adopting ridge tillage cultivation technology (RT) in China has a long history of more than 2000 years. In this paper, we reviewed recent advances of the development and application of RI in China. The better yields from crops grown on ridges/furrow compared with those on flat land were attributed mainly to the improvement of soil moisture conditions, better air permeability and effective supply of soil nutrition. However, most studies of RI are mainly concentrated in upland crop. It has not been reported on RT's higher water use efficiency (WUE) and the capacity of drainage & impounding during the rice production process. New systems of ridge tillage & terrace cultivation model (RTT) for irrigated rice are described here. Further research is needed to optimize management strategies and to strengthen basic research for RTT to obtain environmental and economic benefits and to evaluate practicability and effectiveness of RTT in the paddy field. (C) 2014 Elsevier B.V. All rights reserved.