1. Upland rice, drought-tolerant, cultivated rice suitable for dryland cultivation, also known as upland rice, refers to cultivated rice that can adapt to growth in innocent dry land, sloping land and arid ecological environment. It is a variant of rice, and also It is called drought-resistant rice. Unlike the “rice†grown in paddy fields, dry rice does not require a layer of water in its lifetime, usually after raining in dry land or dry land, or on the basis of appropriate irrigation. However, dry rice is not wheat or corn. It must have irrigation conditions during special critical periods, otherwise it will have a great impact on production. Although the growth and temperature requirements of upland rice are similar to those of rice, the water requirement for a lifetime is about 2/3 or less of that of rice. If the weather is smooth, dry rice can not be watered during the whole growth period. However, if there is no effective precipitation for a long time, the farmland is dry, and the "three times of water" irrigation can not be less in any case, that is, the seedling water, the booting water, and the heading grouting water after sowing. 1 Qi Miaoshui: It is related to whether the seedlings can be released in time and the whole seedlings are emerged. After sowing, continuous drought will affect the emergence of rice and affect chemical weeding. 2 Booting water: drought at the booting stage, which can lead to small spikes, reduced number of spikes, and even problems such as stagnation of growth, and areas with good water source conditions remain moist or shallow.
3 heading grouting water: lack of water at the heading stage, slow heading, lowering of seed setting rate, drought in the exposed stage, increase in empty grain, decrease in 1000-grain weight, and decrease in rice quality. Therefore, the water is required to be irrigated at the beginning of the ear to ensure its water demand. .
Advantages of upland rice: drought-tolerant and water-saving than rice. Usually, it only needs to be supplemented with irrigation for 2 to 4 times in the northern part of China, only 1/4 of the rice. In the rain-stricken south, there is generally no need for irrigation, and it depends on rain. Upland rice is suitable for light cultivation needs such as live broadcast, saving labor input and improving labor productivity. The endogenous aerated tissue of upland rice is developed, while the general dry crop does not have this structure. Therefore, dry rice is more resistant to waterlogging than corn, soybean, wheat and other dry crops, and is suitable for planting in low-lying and dry land, and generally can obtain higher yield than dry crops. Upland rice is more resistant to mites and is suitable for growing in many types of dry land. In some countries, it is often used as a “pioneer crop†for the development of dry land. The rural areas of the United States are sparsely populated, with large production scale and high level of mechanization in agricultural production, which is very suitable for direct broadcast in drylands. Live broadcasts in the drylands are conducive to increasing labor productivity, but yields are lower. There are many people in China, and the contradiction between people and land is prominent. It is advisable to adopt traditional rice cultivation methods that are intensively cultivated. Although the traditional rice planting method of intensive cultivation has more manpower, it has a higher yield and is conducive to alleviating the contradiction between people and land. Upland rice cultivation in the world is mainly distributed in South and Southeast Asia; followed by Brazil, Colombia and Chile in Latin America; and West Africa in Africa again. There is also a small distribution along the Gulf Coast of the southern United States. Upland rice is characterized by drought tolerance, suffocation, and wide adaptability. The development and utilization of upland rice has special significance for ensuring global food security in the context of global population expansion, climate warming, water shortage or large-scale drought. .
Second, the relationship between rice, rice and water is very close. People call rice a aquatic crop, which means that it is inseparable from water. Rice needs to grow under certain water conditions. This is its physiological needs. It is said that rice is an aquatic crop, but the life of rice is not to maintain the water layer at every stage of growth. Sometimes the field needs shallow water, sometimes it does not need water layer. In practice, rice is a semi-aquatic crop, which lays a theoretical foundation for the application of new water-saving irrigation technology. The old method of soil preparation and irrigation is mainly based on water preparation, deep water irrigation, flood irrigation, causing soil compaction and poor ventilation. It is not conducive to root development and is therefore generally low-yield. High-yield rice must reform the paddy field irrigation technology, improve rice root activity, and make rice have a good living condition. The high-yield rice experience is: “To root the waterâ€, “to root the roots†and “to protect the roots†The second is the combination of the four conditions of “water, fertilizer, gas and heat†and soil fertility. The water is adjusted with water, the water is conditioned, the water is tempered, dried and wet, the roots are kept and the yield is increased.
Among the four major factors of rice field water, fertilizer, gas and heat, water is the main aspect of contradiction. Water regulation, water regulation, and water adjustment can effectively control rice growth. This is rice. The basic principles of research on water-saving and high-yield irrigation technology. Water saving irrigation has many advantages. Water is the "master switch" of fertilizer, and it is also the "regulator" of air and temperature in the soil. Therefore, water plays a direct role in promoting and controlling the growth of rice. The management of water is of great importance in capturing high yield of rice. Rice water demand, rice field water consumption mainly has three ways, namely “evaporation between trees, foliar transpiration, field leakage. Rice has two peaks during the whole growth period, the first time in the tillering stage (peak mainly from the inter-green The second peak is at the booting stage (the peak is mainly formed by foliar transpiration). The peak of evaporation between the trees is due to the small number of plants in the early stage of rice, the small leaf area, and the sunlight can be fully irradiated on the water surface. The amount of evaporation is high. On the contrary, with the increase of plants and the increase of leaf area, the leaf transpiration gradually rises, and the average daily water requirement reaches the highest peak of 8.6 mm during the jointing stage, and then gradually declines. This is the whole demand of rice. Water law.
Third, deep rice generally grows in water of 1 to 6 meters deep, usually no more than 8 meters, the shallowest is about 50CM, and the stem of deep rice can be as long as 5 to 6 meters. The main conditions for its growth depend on three factors: water level, light and soil. Almost all deep rice varieties have strong light sensitivity. Under certain water depth and light conditions, the seeds are easy to fall off, and the seeds germinate under the conditions of light and water depth. The dormancy period can last for several weeks. The ear density is usually 50~120 per square meter, the average grain yield is about 300 kg per mu, and some varieties can reach 400 kg per mu. Deep-water rice is mainly grown in Asia and Africa, mainly in Southeast Asia, Bangladesh, India and other countries. China has not reported large areas of deep rice. There are currently about 6,000 deep rice varieties in Asia. Deep rice in Africa is a different species. Deep paddy fields can raise fish at the same time, and its slender stems can provide a good habitat for fish. The fallen grains and rice leaves are also the favorite food of fish. At the same time, deep rice also has a certain effect on purifying water bodies and flood control.
Stylish and functional alternative: Elegant toilet tissue holder is a great replacement for those traditional types, no more spring-loaded spindle to deal with.
Featuring delicate, unadorned style, the Gunmetal Bathroom toilet brush holder is a study in tasteful simplicity. This stylish towel brush holder for bathrooms comes with mounting hardware and a template for easy home installation.
Hotel And Project,Tissue Paper Stand,Toilet Brush Black,Bathroom Black Toilet Brush Holder
Kaiping city Pinsen Sanitary ware Co.,Ltd , https://www.corpthen.com