"Even with high piles and throwing dumplings" is a new technology for super-simplification of natural straw returning that we put forward in 2000 based on previous research. Since 2000, we have continuously set up experiments to conduct in-depth research on this technology. At the same time, many places in the province have also demonstrated and promoted this technology. The advantage of this technology is that no-tillage transplanting can not only reduce soil cultivation, save labor, equipment, energy, and reduce costs, but also cover and retain high piles of straw to protect soil's natural structure with biological measures and increase beneficial microbial communities and soil organic matter. , Saving 50-100 cubic meters per mu of irrigation water in the whole field and later period (1 acre = 1/15 hectare, the same below); In addition, due to this technology, fertilize the soil and reduce the amount of chemical fertilizers, and both fertilizer and pesticide are in the growth of the crop. The early application is conducive to the implementation of pollution-free cultivation of high-quality crops; and throwing planting seedlings to turn green to survive fast, early tiller, tiller number, root system developed, ear more large grains and more, is a very promising new technology. However, because no-tillage and the amount of straw have a great influence on the growth of rice, such as continuous no-tillage, the soil becomes tight, the fertilizer is concentrated on the surface, the weeds and pests increase, and the excessive wheat (canola) stalk In flooding, rotting causes poisoning to rice and competition with rice seedlings. Therefore, in order to make the technology more effective in increasing production and increasing quality, the following key technical links should be mastered in the application. I. Appropriate area and site preparation The technology is suitable for areas where rice and wheat (rape or vegetable) are ripe, especially where there is more people and less land, and labor is relatively insufficient, and the cultivation and cultivation techniques are relatively high. Flat terrain, deep soil ploughs and strong water retention and fertility requirements are required. Due to years of no-till, soil seepage early rice growth large losses, field water kept short time, requiring irrigation water convenient time to meet the water demand of rice. As far as the whole province is concerned, it is the most suitable area for the paddy fields with flat terrain and convenient irrigation, such as the plains in Chengdu, basins in the basin, and basins in the Zhoushan Mountains. The key to the whole field is leveled, preferably in the first quarter adoption of the technology will be raking fields, late autumn after the season and then leveling uneven places. Further, before the rice planting, plowing the inner edge of the field of about 0.5 m, in order to facilitate water retention ridge, and ridge wrapped with plastic film. Second, a suitable quantity and sowing wheat Gallant manner tillage sowing machines, spreading, sowing the pry nest-demand mode, we chose a different process covering straw 150,300,450,600 kg / acre, the results for the There was no significant difference in the yield of wheat (with Mianyang 26) between the different cover weights under the sowing method, indicating that the range of suitable cover grass was larger. However, taking into account the post-season throwing, if the amount of grass cover is too large and the seedlings are not completely rotted when the seedlings are transplanted, then the seedlings will not be easily soiled. Excessive straw will produce organic acids when it is rotted after flooding, causing poisoning and damage to the seedlings. growth, the amount should not be excessive so Gallant, to about 150 kg / mu appropriate. Regarding the sowing method, the yields of seeding and sowing in the nests were significantly higher than those sown, and they were also favorable for the post-planting and growth of rice. Third, the way of raising eel and raising eel can use dry eel or water eel, dry eel is better, due to dry eel seedlings dwarf, drought-resistant, suitable for throwing live tree after delivery. The age of throwing plant should pay attention to the convergence from the eaves and the survival of the seedlings. The average age is 30-40 days. In order to increase the standing seedling rate of cast seedlings, paclobutrazol can be used for 1-2 times to cultivate dwarf strong and strong. Fourth, the height of straw to leave the height of wheat straw to keep the height of about 30 cm is appropriate, rape culms can be higher, vegetable stalks can be appropriately shorter. Excessive pile retention may affect the quality of spring harvest and rice seedling quality. The seedlings are not easy to soil, resulting in a lower survival rate. The low pile retention and the disparate distribution of straw in the field also affect the quality of seedling planting, and leave the straw returned to the field. Less. After leaving the pile, the cut straw should not be laid directly in the field. It is best to stack it on the field side. After the seedlings have survived, they will be planted in the field. V. Density and control of grassland damage Putian cultivars will sow early and vigorous breeding and promote low-level tillering, so that the paddy field will grow thin and dense. Honda relies on throwing rice seedlings into shallow soils, producing low-level tillers, strong tillering power, and water and fertilizer regulation to form a reasonable group structure. Generally speaking, the varieties with strong tillering ability, large spike type or long growth period should be thin, and the earliest or long-term nutrition period should be suitable for thinning; otherwise, the density can be slightly larger. In fields where the fields are not flat, the soils with poor water retention capacity and large amount of straw cover should be dense enough to prevent the sun or straw from affecting the survival rate. We have set a seeding density of 1, 1.5, and 20,000 holes/mu using Gangyou 22 as a test material, and the results are based on a high yield of 1.5 to 20 thousand holes/mu. 1.5-2 million points / acre more appropriate. In addition, the prevention of weeds is the key to the success of this technology. In addition to Xiaochuan, we must also pay attention to weed control in addition to chemical weed control. We can spray herbicides one at a time before and after throwing. Or artificially weeding the grass to reduce the use of pesticides and produce pollution-free quality products. Six, fertilization due to early prone to straw and seedlings to compete for nitrogen, and straw decomposition can provide long-term nutrients later, so the main nitrogen fertilizer application in the previous period. The amount of nitrogen fertilizer is 100 kg/ha of pure nitrogen, and 70% of the base fertilizer can be applied to the field 1-2 days before throwing. It can also be applied to the field after throwing seedlings to survive in the field. Avoid fertilization on the day of throwing plant to avoid occurrence. Burning seedling phenomenon. The other 30% of nitrogen fertilizer is used for topdressing during the tillering period, which not only promotes the early growth of delivery, but also facilitates the decomposition and rot of the straw, provides nutrients for the later period, and also avoids the influence of late application of chemical fertilizers on the quality of rice and guarantees the production of rice. Rice Safe Nutrition. 7. Irrigation can artificially create a suitable water supply environment for rice to promote good growth and development of rice. In the period of returning to green live trees, due to the large water leakage in the no-tillage field at this time, ground irrigation and super-irrigation should be performed. The seedlings must not be dehydrated and exposed to dead seedlings, and the seedlings must not be floating too deeply because the water layer is too deep to take root. In the delivery period, shallow water or wet irrigation is appropriate. Young panicle differentiation is the most sensitive period of water requirement in rice life, and it is also the period with the largest amount of water. Intermittent irrigation or the establishment of 2-4 cm shallow water layer is preferred. After heading, it can be used for irrigation and promote the development of old stems and roots, laying the foundation for the prevention of premature aging.