The low survival rate of apple trees is a very troublesome problem. Today, I would like to share with you what is the reason for the low survival rate of apple trees. What improvements are there? What is the reason for the low survival rate of apple trees? 1, insufficient water Moisture is the key factor affecting the success of apple new gardens, including soil moisture content and seedling water retention. 1.1 Soil moisture. First, the natural conditions are poor. Yanchuan County is a eugenic area of ​​mountain orchards. Most orchards are built on mountainous and sloping fields. There are no irrigation conditions. Watering by car and people can not meet the soil moisture requirements. Second, intercropping The interplanting is unreasonable. Many farmers do not plant as required, and the nutrient bandwidth is not enough, which leads to water competition between crops and seedlings. The newly planted seedlings are weak in growth and cannot provide their own water demand. 1.2 The seedlings themselves have serious water loss. First, the seedlings are not carried out according to the specifications of the seedlings. The seedlings with leaves increase the transpiration of the seedlings themselves, resulting in the water loss of the seedlings too fast and too large. Second, the externally adjusted seedlings are improperly managed during long-distance transportation, resulting in loss of water in the seedlings. , missed the best planting time; the third is that the seedlings are not standardized, the plants are not smashed before planting, the seedlings are exposed for too long, resulting in water loss; the fourth is that the seedlings are planted without watering. 2, the quality of seedlings is not high The quality of seedlings is a prerequisite for the success or failure of new gardens. In recent years, the provinces and cities have vigorously developed the apple industry. The market is short of seedlings, and a large number of secondary seedlings, even third and fourth grade seedlings, have entered the market. In the autumn of 2013, the city-level seedling base could not provide enough seedlings, and the seedlings needed to be solved by the counties themselves. The seedlings of Yanchuan County were from Fuxian, Yinchuan, Nanniwan, Yanchang, Zichang, Luochuan and Yichuan. In the same place, the seedlings of the seedlings are not developed, the roots of the seedlings are not developed, the main roots are few, the seedlings are not up to the requirements, the degree of lignification is low, the buds are not full enough and the buds are long, which directly affects the survival rate of the new garden and tidiness, 3, planting technology is not standardized Since most of the fruit farmers have not been trained on the spot, especially the farmers in the northern townships (Gaojiatun Township, Jiajiaping, Fengjiaping) lack the awareness of planting fruit trees, and the progress and light quality in the planting process cannot be strictly controlled according to the planting technical specifications. This is also an important reason for the low survival rate. 4, the rodent damage is serious, resulting in uneven landscape The rats in Yanchuan County are seriously damaged by seedlings. The moles mainly feed on potatoes and grass roots. In winter, the crops are poor. The moles don't have food, and the roots of the seedlings are eaten. Some of the fruit trees that have survived are bitten by the moles in the following year. The main root, and some bark were seriously foraged, which required a lot of replanting in the following year, resulting in uneven landscape. 5, serious mechanical damage Many farmers have not yet realized the economic benefits of planting apple trees. They mistakenly believe that the cultivation of apple trees is the occupation of farmland. The protection of cultivated land is not enough. Some even plant high-crop crops, which not only block the sunlight, but also compete with the roots for nutrition. 6, post-plant management is not in place As the saying goes, "three-point cultivation, seven-point cultivation", many farmers in Yanchuan County believe that the completion of the task of planting is completed, neglecting the later management and protection, in addition to setting rods, bagging, strengthening Fertilizer management, cultivating and weeding It is also necessary to strengthen the prevention and control of pests and diseases and tree management. What should I do if the survival rate of apple trees is low? 1, to ensure adequate moisture In order to select the site, it is necessary to select the south slope, southwest slope or southeast slope of the middle and upper slopes with less soil erosion, deep soil layer and high organic matter content. It is forbidden to use the lower slope, hillside vents and Sichuan and Taiwan in the mountain. Build a garden and build a rain cover. In the case of water shortage, it is necessary to pour enough planted water, and to avoid the land with more hail. Seedling treatment: First, the roots of the seedling damage are properly trimmed to facilitate the development of new roots; secondly, the seedlings transported over long distances are soaked in clear water for 12 h; the third is the roots of the seedlings; the fourth is the seedlings that cannot be planted in time. Do a good job of fake planting. Rational intercropping, leaving enough nutrients to ensure that the crops do not compete with the fruit saplings. The best crops are beans, and high-crop crops should not be planted. 2, seedling selection Adhere to the principle of “self-cultivation, self-cultivation and self-cultivationâ€, and give priority to the selection of excellent seedlings in Yanchuan County and municipal-level seedling bases. The quality of the seedlings is: there are more than 3 main roots, more than 20cm in length, more than 0.45cm in base thickness, and more small lateral roots and fibrous roots; the stems are thick and strong, the height of the seedlings is more than 120 cm, and the stems are 10 cm above the interface. Above 1.2 cm, the buds on the seedlings are full, and there are more than 8 full buds in the plastic belt; the graft interface is good, and there is no quarantine object for pests and diseases. 3. Strictly plant science Qiaohuayuan is suitable for planting density of 375-660 plants/hm2, and planting 495 plants/hm2 in Yanchuan County. It is planted at a row spacing of 4 m×5 m on flat land, and the slope is planted at a row spacing of 4 m×6 m. Anti-slope terraces. Planted in the end of October each year until the soil is frozen. Before planting, each township should plan and organize the land to lay a good foundation for the later planting work. Dig a 40 cm small pit at the planting point. When planting, ensure that the roots of the seedlings are naturally stretched. Take the topsoil and bury the roots, and step on the side to raise the seedlings to achieve the “three burials and two steps to dry up†to ensure the soil in the roots and the depth of planting. It should be 3 cm above the junction. The strong seedlings are fixed (80-100cm), the weak seedlings are low-dry (50~60cm), and after drying, the seedlings are overwhelmed in the same direction and covered with 40cm thick cold-proof soil. The autumn planting seedlings are placed in the spring of the next year, and the seedlings are placed in the northern Shaanxi area before and after the rain (from late April to early May), and must be placed in two times, the first release of 1/3 to 1/2, the second time release. Immediately after putting the seedlings, they should be filled with water, covered with film, and bagged. The first film can increase the ground temperature and promote root growth; the second is to reduce water loss and maintain soil moisture. After the germination of the seedlings, the plastic bags should be removed in cloudy or evening. 4. Strengthen the prevention and control of pests and diseases To achieve prevention and comprehensive prevention. Irregular inspections are carried out to achieve early detection and early treatment. In order to prevent the bite of the mole, Yanchuan County has purchased multiple mole traps and received good results. It is also necessary to increase the prevention and control of pests and diseases to prevent the occurrence and development of pests and diseases. 5. Improve farmers' awareness and reduce human damage In the form of on-site meeting, the four key technologies of apples will be popularized to the majority of fruit farmers, so that farmers can learn while practicing and not digesting on the spot. In 2013, Yanchuan County held 13 on-site trainings and trained 6,000 farmers. In the autumn of the new garden, the results are obvious. 6. Strengthen post-plant management After planting, it is necessary to check frequently, especially in areas that are susceptible to freezing. The thickness of buried soil should be thicker. The thickness of buried soil in the roots and stems of seedlings is the key to ensure the safe wintering of seedlings. In the spring of spring, the soil around the rhizome should be removed. To prevent the roots of the seedlings from being too deep and affecting survival.
Dyes intermeidates are important raw material for different dyes. Dyes intermidates can include many products, we mainly supply Sulfanilic Acid & Sodium sulfaniliate. Sulfanilic acid is mainly used for azo dyestuff, such as: acid dyes, direct dyes and so on. Sodium sulfaniliate is also mainly used for acid dye, direct dyes and reactive dyes.
*Related Products:sulphanilic acid.
Dyes Intermediate,Sulfanilic Acid,Sodium Sulfanilate,Acid Dyestuff Intermediates SJZ Chenghui chemical co ltd , https://www.chenghuichemicals.com
Total 1 | <First <Prev 1 Next> Last> |
share to: