the population decreases Learn more about the population decreases
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Study on the efficiency of Cotton Light Table in different planting patterns
In order to further increase the cotton yield, it is difficult to increase the number of plants per unit area. In production, it is necessary to increase the density, improve the poor ventilation and light transmittance in the middle and lower part of the cotton population, and improve the light transmittance and photosynthetic efficiency in the middle and lower part of the cotton population. In this paper, through the study of cotton population photosynthetic efficiency and light transmittance of different planting patterns, in order to determine the reasonable cotton population structure in specific areas, and to provide a basis for high-yield and high-quality cotton cultivation. Materials and methods 1. The general situation of the test was conducted in 2002-2003.
2019-01-15 -
A probe into the Paradox of "population decreasing and area increasing" in Rural areas
As of 2014, the urbanization rate in China has reached 54.7%, and a large number of rural people continue to transfer to the cities. In theory, with the outflow of population, the village should gradually shrink, but in practice, the scale of the village is "cake-sharing" and "crawling along the road".
2015-12-26 The countryside " the population decreases the area increases paradox analysis -
China's "empty nest of great powers" has become a foregone conclusion.
The empty nest of a big country in China is a foregone conclusion! The Spring Festival has been a hasty passer-by in my rural hometown after many years, and the Spring Festival went back to my hometown in Zhoukou, Henan Province. I don't know if I saw too many new buildings in the big city and felt that the village was very dilapidated. Some of the newly built buildings seem to show
2016-03-20 China " big country empty nest " has become a foregone conclusion big country -
Deepening the Reform of Land system in order to improve the quality of urbanization
Recently, there has been a lot of discussion in the domestic media on the issue of urbanization, and some extreme opinions have pointed out the various defects of urbanization in China, which seems to negate the meaning of urbanization. The author thinks that although the quality of urbanization in our country is not high, the achievements of urbanization are not high.
2016-03-20 Improvement urbanization quality necessity deepening land system reform -
Control of powdery mildew of growing wheat
In recent years, with the improvement of fertilizer and water conditions in wheat fields and the increase of population density in high-yield fields, the incidence of wheat powdery mildew increased year by year. After the wheat was parasitized by powdery mildew, the plant respiration increased, the transpiration intensity increased, and the photosynthetic efficiency decreased, which seriously affected the normal wheat.
2020-11-08 Seed wheat powdery mildew disease control in recent years with wheat field -
It is not appropriate to continue to accelerate urbanization.
Editor's note: 37 years later, the Central Urban work Conference was held again, indicating that China's urban construction has entered a new stage, and "urbanization" has become the focus of public attention. At present, the urbanization rate of China's resident population is close to 55%, which means that China's urban construction
2015-12-26 Not suitable continue accelerate promote urbanization original editor's note time interval -
The question of scholars: who will farm and how to farm?
The question of scholars: who will farm and how to farm?
2019-02-18 -
China's total grain demand will reach its peak in 2030
China's total grain demand will reach its peak in 2030
2019-02-18 -
Adopt high-quality queen bee
In order to adopt the high quality queen bee, we should mainly consider three aspects: selecting the Chinese bee species with excellent species and production performance, adopting the new queen bee and preventing the degradation of the bee species in use. The queen bee with excellent characteristics is the guarantee of strong colony rearing, and the bee species with strong fecundity, strong population potential, weak bee division, high yield and strong disease resistance (especially resistance to cystic disease) should be selected in the breeding of Chinese bee. A good queen bee can be obtained through the bee species production department, but it must be noted that the introduced queen bee should be able to perform in the production of beekeeping in the use area.
2019-01-16 -
Looking at the trend of Agriculture from the Perspective of "four advances and four retreats"
With the development of science and technology, the refinement of social division of labor, the acceleration of population mobility, the change of consumer demand and many other factors, China's agriculture is undergoing multi-faceted and multi-level structural changes, such as differentiation, fission, aggregation and reconstruction. Earthquake.
2016-01-10 From "four advance and four retreat " look agriculture trend with -
Re-discussion on the withdrawal of Rural Homestead
Introduction: with the acceleration of urbanization, China's rural population migrates to cities and towns on a large scale, and the problem of rural homestead withdrawal has become increasingly prominent. Under the situation of economical use of land, the problem of rural homestead utilization, the establishment of homestead withdrawal mechanism and the reform of rural areas
2016-01-10 Rural areas homestead retreat problems again discussion introduction -
Synthesis of exotic poisonous weeds in northern agro-pastoral ecotone-- Solanum nigrum
Recently, the Ministry of Agriculture organized more than 140 people from agricultural resources and environmental protection technicians in 17 provinces and cities (autonomous regions) and experts from relevant scientific research and teaching units and representatives of the press to observe the demonstration of comprehensive prevention and control of calyx nigrum in the depths of Horqin grassland in Baicheng City, Jilin Province.
2016-01-10 North farming and animal husbandry staggered belt exotic poisonous weeds - calyx -
The huge stock of rural homestead resources needs to be activated.
The reform of the land system is the core of the new round of rural reform, and it is the basic work to once again release the dividend to promote rural development and accelerate the process of new urbanization. The rural homestead with a huge stock area is an important part of the land reform. Find out the bottom of rural homestead
2016-03-20 Stock huge large rural homestead resources urgent need activation -
Horticultural diary | three common plants that change indoor air quality
How to produce fresh air A doctor of indoor research said to himself: ♥ about 17 years ago, I began to be allergic to the air in Delhi. My doctor told me that I.
2019-02-25 -
China's next crisis: food crisis
China's next crisis: food crisis
2019-02-19 -
What if there is no one to cultivate land in rural China?
What if there is no one to cultivate land in rural China?
2019-02-18 -
Microbial fertilizer leads the new direction of fertilizer industry development.
It is undeniable that the application of chemical fertilizers has played a good role in improving the per unit yield of grain, ensuring the supply of agricultural products, and solved the problem of feeding the growing population. However, the long-term unreasonable use of chemical fertilizer has made us rely on ploughing for our survival.
2016-03-20 Microorganisms fertilizers leadership industrial development new directions -
Points for attention in the treatment of fish diseases
Points for attention in the treatment of fish diseases
2018-07-23 -
Prevention and control of "three insects and one disease" of mushroom
The "three insects and one disease" harmful to autumn mushrooms are mites, jumpers, mushroom mosquitoes and harmful verrucosporium. The characteristics and control methods of these diseases and insect pests are described as follows. 1. In the process of the occurrence of symptoms caused by mites, if the hyphae are found to have the phenomenon of returning bacteria, such as the decrease of villous hyphae, the increase of simple hyphae, and the pink bright spots on the surface of the hyphae, the mite head appears in the mushroom bed. When there are 3 to 5 mites in the range seen with a magnifying glass, the control target is reached. After covering the soil, the mites will move with the soil surface as the hyphae grow to the soil surface, and concentrate.
2019-01-16 -
Professionalize agricultural production
The season coincides with autumn, and it is also the season for the annual harvest of agriculture to settle accounts, and the harvest in the fields and the income of farmers have become figures that many people have in mind. At a time when the agricultural working population and grain acreage are constantly decreasing, how to
2016-01-10 Let agricultural production professionalization season just in time autumn also has arrived