Selection of apple dwarf rootstocks
At present, the apple cultivation in European countries is mainly based on self-root stocks with dwarf rootstock “M9T337†selected by the Netherlands. In the United States, the G-series (G16 and G41) rootstocks that they chose to breed were also effective. The rootstocks selected by Japan and France are compared with the M9T337 rootstock. According to foreign data and cultivation observation in recent years, M9T337 rootstock apple seedlings are suitable for cultivation in Shandong Province of China, and no poor cultivation characteristics have been found. M9T337 rootstock and M26 self root anvil, the tree growth is not the same, M9T337 rootstock there is a "bigfoot" phenomenon, the tree growth dwarf, flower formation is relatively easy, the result is early, high yield. Therefore, the M9T337 is the most widely used in the world, and the M9 rootstock has the best flowering and rooting effects of the M9T337 type. The M26 rootstock has a large amount of tree growth, its flowering ability is significantly lower than that of the M9 rootstock, and its flowering is late. It appears to be a Qiaohuamiao. Therefore, it is mainly used for the “dwarfed anvil†and is mainly used for dwarfing. With a large number of root stocks and seedlings put on the market, M26 will automatically adjust to the right position. SH rootstocks are dwarf rootstocks selected by Shanxi fruit trees. At present, Shanxi mainly uses Nos. 3, 6, and 19, and Hebei Agricultural University selects No. 38 and No. 40. From the perspective of application, SH is not easily rooted from rootstock propagation. Therefore, it is now mainly used as a "dwarf interstock" seedling. From the cultivation observation, the growth of the SH rootstock tree was relatively large, and the flowering effect was similar to that of the M26 intermediate rootstock seedling. Of course, appropriate choices can be made according to site conditions. However, under the same management conditions, the dwarfing interstock has the smallest growth, and the tree anvil has a large amount of freezing damage, and the phenomenon of premature aging of tree vigor is obvious. This 50m distance measuring meter is made of two parts: the laser distance outside unit and the sole part laser measure module. Great distance range is from 3cm to 50 meters with ±1.5mm high accuracy. Digital distance measuring device is quick and reliable measure with one hand pushing the button. It is designed for hand helding, very convenient to put in your jacket pocket or trouser pocket. 50M Laser Distance Measurer,Mini Laser Measurer, Laser Measure 50M,50M Laser Distance Meter Chengdu JRT Meter Technology Co., Ltd , https://www.rangesensors.com
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