Agricultural lighting is not so simple to solve several core issues

On earth most animal and plant growth cannot do without the sun radiation, but in different regions and different time, the sun light supply is limited and the difference, avoid the cycle of light, there are still a lot of light is inadequate, so fill artificial light in the growth of plants and animals in came into being.

In LED technology, mainly rely on the high pressure sodium lamp, fluorescent lamp light source, however, this kind of traditional light source in the spectrum and the energy is not flexible, and because of the diversity of plants and animals, different species of artificial lighting requirements may be different, the application and development of artificial lighting in the slow.

LED is the rapid development of lighting technology in recent years. In addition to light effect, life has a lot of advantages compared with the traditional light source, great flexibility in space, time, LED spectrum and scale space, creating a LED in plants and fill on the huge application prospect. At the same time, in recent years, LED technology continues to improve, such as continuous improvement of light efficiency, rapid decline in prices, to promote the LED for agricultural lighting substantive progress.

But because of the complexity involved in agricultural lighting, the LED lighting is generally used for agriculture in the exploratory trial stage, there are many unsolved problems in theory and practice, this paper tries to elaborate these aspects some one-sided.

First, the multidisciplinary nature of agricultural lighting

If the animal and plant lighting lighting lighting is included in the scope of agriculture, the subjects including botany, animal science, biostatistics, lighting technology and control technology. The three is the field of biology, which is the lighting technology field, a wide span of subjects, in this subject, lighting technology is the field of biology, and the content is the experimental process and result evaluation.

Overall, biology knowledge is the most important part of the agricultural lighting, but the current agricultural lighting mainly refers to the lighting technology using LED and LED, a high degree of flexibility, making the agricultural lighting process, as the main agricultural or biological science, highly complex need lighting experts, to achieve the best lighting conditions of plant species of various animals, while subjects in the visual field of successful lighting lighting is perfect, agriculture is worth learning. Therefore, the discipline and technological progress of agricultural lighting, scientists and scientists in the field of agriculture and the need to work closely with scientists in the field of lighting.

Two, the complexity of agricultural lighting

As a science and technology related to agriculture, agricultural lighting inherits the complexity of agricultural science, as mentioned earlier, including two aspects: agriculture and lighting.

The former study of the species is very large, and each of the 1 species, the influence of the factors are also very much. Such as the basic elements of plant growth, sunlight, air, water, in addition, seeds, soil, the surrounding environment such as temperature, humidity, climate changes, but also affect the growth of plants.

The animal, because it is the activities, including the more favorable factors, even if all of these conditions, the dynamic growth of individual plants may also have differences, which determines the research must be carried out to study lighting agricultural statistics method.

In addition, there are a number of variables in the lighting, including the spectrum of light, intensity, time and cycle, the form of light (steady state or pulse), etc..

The above two aspects, determines the complexity of agricultural lighting, although the growth of plants and animals through the strength optimization control of light, can maintain the same condition, the mutual influence of various conditions but may exist will cause more complicated problems.

Three, agricultural lighting test difficulty

The complexity of agricultural lighting determines the difficulty of the study of agricultural lighting, which is reflected in the specific experiment is too many variables. Although the main test light, through the study of different illumination conditions, the growth of animals and plants such as irradiation intensity, spectrum, irradiation time, irradiation period and irradiation mode, and expect other fixed agricultural conditions such as temperature, humidity, air, water, nutrients, seeds etc..

But these two factors may influence each other, so the experimental research in the actual test, to change the conditions considered very much, at the same time for each condition, biostatistics consideration, also have a certain sample. This makes the test conditions and sample, plus each test conditions need to grow a certain time, the final result of lighting agricultural situation is: the test sample is very long and the test time span is very long, agricultural lighting has become the research much time and space.

1 examples, if set 3 light condition variables, such as spectral intensity, irradiation time, each variable with 10 discrete values, then we know that there are 1000 kinds of conditions, and biological conditions if 10, that is 10000, if in each case, a sample of 10, that is 100000 if a sample of each sample to 2 months, you can imagine the difficulty of test.

Therefore, the actual research, was forced to adopt reduce test variables and reduce the number of each test variables, the author in reading the relevant literature, often found by light conditions in just less than 10, there may be used in test conditions, not optimal, and thus can not search for the best results.

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