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Rice planting and breeding model

2019-12-11 来源: 51Due教员组 类别: Essay范文

下面为大家整理一篇优秀的essay代写范文- Rice planting and breeding model,供大家参考学习,这篇论文讨论了稻田种养模式。稻田种养是一种古老的传统农作模式,历史悠久,中国是历史上稻田种养最早的国家,早在2000多年前的汉中和成都便已盛行稻田养鱼模式。在当地自然、社会资源条件的基础上,稻田种养形成了与当地环境特征相适应的稻田种养技术、种养模式和相关的生态作用机制等,并有一部分沿袭至今,如犁地耙田时间、放养苗种时节和稻田水质观测等。这些传统种养模式与技术在现代稻田种养中依然发挥着使用价值。

Rice planting and breeding model,稻田种养模式,essay代写,作业代写,代写

Paddy field farming is an ancient traditional farming mode with a long history. China is the earliest country in paddy field farming in history. As early as 2000 years ago in hanzhong and chengdu, paddy field fish farming mode was prevailing. On the basis of the local natural and social resources, paddy field planting and breeding have formed the planting and breeding technology, planting and breeding mode and related ecological action mechanism that are suitable for the local environmental characteristics, and some of them have been inherited to this day, such as ploughing time, seeding season and paddy field water quality observation. These traditional planting and breeding patterns and techniques still play a useful role in modern rice field planting and breeding.

Paddy field planting and breeding is a typical ecological agriculture model in practice of agroecology theory. The construction and operation of this model largely depend on the guidance of agroecology theory. With the large-scale promotion of paddy field planting and breeding, the contents of agricultural ecology theory in paddy field planting and breeding are continuously refined and enriched. In the 1980s, ni dashu first proposed the theory of rice and fish mutualism, which laid a foundation for the research on the theory of paddy field breeding. On this basis, the artificial biosphere and the new tillage system of rice field were put forward, that is, through the method of artificial regulation, the single rice production mode was transformed into the colony production mode of rice, ping and fish. Chen feixing et al. introduced system structure theory, food chain theory, niche theory and mutualism theory, and explained the ecological effect of rice field crab breeding model by taking it as an example. The current research on paddy field planting and breeding has also been integrated into the theory of circular economy, the theory of sustainable agricultural development, the theory of ecological economics, etc.

At present, the cultivation of paddy fields in China is mainly distributed in east China, central China, south China and southwest China. According to the characteristics of local natural and social environment and their own farming characteristics, various rice paddy planting and breeding modes have been created in each region, including fish cultivation, shrimp cultivation, crab cultivation, eel cultivation, turtle cultivation and duck cultivation. Most of the construction steps of these models are presented in the form of technical texts, which are described from the perspective of practical operation, while less systematic generalization is carried out from the theoretical level. Therefore, based on summarizing and refining previous technologies, this review attempts to summarize the main construction steps of paddy field planting and breeding model from the theoretical level.

There are generally three steps to construct the planting and breeding model of rice field in China: step 1: qualitative arrangement; Step 2, quantitative arrangement; The third step is regulation and management. Qualitative arrange stage main consideration of what kind of rice planting, breeding aquatic products, need to put into what, what want to output, need to establish what kind of relationship between plants and animals, how to avoid the connection, so as to set up mode, the basic framework of this phase is mainly determine the paddy planting and raising mode of components and their mutual relations. The stage of quantitative arrangement mainly considers how much rice should be planted, how much aquatic products should be cultivated, how much should be input and how much should be expected to be produced. This stage is mainly to determine the proportion of the components and their mutual relations in the cultivation mode of rice field. In the stage of regulation and management, two contents should be considered: non-manual regulation and direct manual regulation. Non-artificial regulation is mainly through the physiological and biochemical regulation mechanism of the organism itself to adapt to the interaction with the environment and other organisms. Artificial direct control is mainly through production technology to regulate biological, environmental components, and make each other adapt to the process. Generally, after the model is set up, non-manual control is carried out first to observe whether the whole model can achieve a coordinated and stable state through internal adjustment of each component. After that, it can be controlled manually based on the observed problems or artificial targets. This stage is mainly to regulate the interaction between the components in the planting and breeding mode of the paddy field to ensure the normal operation of the material exchange and nutrient circulation among the components.

The normal operation of paddy field planting and raising mode depends on the implementation of supporting planting and raising technology. At present, different planting and breeding technologies have been constructed in different areas of China according to different planting and breeding patterns, such as rice fish, rice shrimp, rice crab, rice loach, rice turtle and rice duck. The contents of these planting and breeding technologies mainly include field selection, field engineering preparation, rice variety selection and planting, animal seedling selection and distribution, breeding management, water quality control, pest control, product fishing and other aspects. In recent years, people in order to better paddy planting and raising mode of operation, expand output, on the basis of the original planting and raising technology to do a lot of technology integration research, mainly displays in three aspects: the pool aquiculture technology combined with paddy planting and raising technology, such as Zhang Dayu in yancheng city in jiangsu province country will ditch strip engineering technology, optimization of synchronous mode, rice crab fish goods crab fattening technology integration, formed a broad b ditch rice crab fish compound ecological farming integration technology, has obtained the full harvest of rice, crabs, fish. Will be cultivated and paddy fields were technology combined with planting and raising technology of rice paddy crop rotation, such as xing-long jiang in fujian province will be technology, field pits or type of rice and fish pond type rice-fish organic combination of crop rotation and pure fish pond productive technology, created the rice fish ecology and integration technology, high quality and high yield crop rotation, the early rice and fish for first, after the rice harvest, no kind of late rice only fish, implementation of rice crop rotation, fish and aquiculture pond technology was used to breed fish, good quality and high yield. The combination of mechanical equipment technology and paddy field planting and breeding technology, such as wu jinshu combined the technology of rice seedling transplanting with rice duck co-cropping technology, to save labor, cost, material, energy and efficiency. Jiang zuming et al. combined the technology of machine-transplanted rice and duck co-cropping with precise quantitative fertilization to improve the utilization efficiency of fertilizers, reduce the use of fertilizers and reduce environmental pollution. Li hacken et al. introduced the frequency vibration moth lamp technology into the breeding mode of rice duck, which effectively reduced the base number of insect population, reduced the pesticide dosage and production cost, and improved the safety quality and efficiency of rice.

In order to adapt to the adjustment of planting and breeding patterns in rice fields, the current planting and breeding techniques in rice fields have been improved, including extending the co-cropping time of plants and animals, increasing the capacity of plant varieties and species in rice fields, and increasing the diversity of species in rice fields. For example, wu minfang et al. improved the original rice-fish co-cropping technology in qingtian, lishui city, zhejiang province, and extended the ecological complementary effect of rice-fish growing period by cultivating regenerated rice, thus increasing the yield of rice and rice-fish. Chapter house well to improve the original rice duck farming technology, on the basis of the original technology was carried out by 1 2 wheel set of raising duck rice, many varieties of rice intercropping ducks, rice and aquatic feed ducks technology duck, double season rice crops intercropping make potato, rice - duck - grass make, rice - duck - SiLiaoDao technology research, has made a series of research results.

Based on summary and analysis of the existing paddy planting and raising technology research results, think of paddy planting and raising technology key in the following two aspects: one is variety selection, including the choice of rice varieties, varieties of aquatic products and related to the farming of aquatic plant species selection, etc., variety selection determines whether harmonious coexistence between biological components within the system, and can adapt to environmental conditions and biological components. The second is the interface technology of combination of planting and breeding. In the process of planting and breeding, the interface technology should first consider the seeding of aquatic products, especially the time point of seeding and the environmental conditions of the paddy field, which is the basis for the survival of the seedlings in the paddy field. Second, artificial regulation, including the timing and degree of regulation. There are two adaptation processes in the symbiosis of plants and animals. The second is the adaptation process of plants and animals to environmental conditions. People should determine the time and degree of regulation behavior according to these two adaptation conditions, such as time and dosage of rice fertilization, time and dosage of feed feeding, property selection of pest control, application time and dosage of drugs, etc. It can be said that human regulation is the key to ensure the yield and quality of agricultural products in the rice planting and breeding system.

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