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The terrain of the Blackberry test site is low in the south, high in the north, and is typical of low hills. The soil is yellow-brown. When the Blackberry Garden fertilizes, the basal fertilizer is pitted by digging a small pit on the side of the blackberry tree and applying the base fertilizer. Therefore, in the first year of the experiment, soil samples collected from the test site were not uniform. The changes of soil nutrients in different fertilization treatments were different. No matter which treatment organic matter content was generally reduced, only individual results increased slightly. It seems that the reason for the decrease of organic matter content is mainly the management of the blackberry tree basal fertilization pits and soils, resulting in the partial turning of the upper and lower layers of the test soil. The soil total nitrogen content of different fertilization treatments was similar to that of the original soil, but most of them increased to varying degrees, but no regularity was observed. The soil nutrient speed meter plays an important role in the measurement during this period.
Different fertilizers and fertilizer levels had no effect on the water content of black berries; the application of organic fertilizers such as rapeseed cake or organic-inorganic compound fertilizer can increase the sugar content of blackberry in different degrees; spraying foliar on the basis of chemical fertilizer NPK Fertilizer and plant stabilisers, the increase in total sugar in black berries is even more pronounced. However, the regularity of the organic acid content of blackberries was not found. Applying fertilizer NPK will help increase vitamin E content in black berries. The application of organic-inorganic compound fertilizer can promote the formation of amino acids in black berries, thereby increasing its crude protein content. In the early fruit stage or the fruitful stage of the blackberry, N accumulated most in the leaves under different fertilization conditions. However, during the fruitful period of the BlackBerry, the N, P, and K contents of all organs of the blackberry were lower than those of the early fruit period. However, the application of organic-inorganic compound fertilizers is very significant in improving the content of N, P2O5 and K2O in black berries, which helps to improve some of the quality of blackberries.
The determination of soil nutrients by the soil nutrient fastness tester combined with fruit analysis showed that the N content in the blackberry orchards of NPK fertilizer or organic-inorganic compound fertilizer was increased to varying degrees in most cases; the PK content was also significant. The increase, especially the K content, has increased even more. It should be pointed out that due to the use of pit fertilizer for basal application, the increase in soil nutrients due to fertilization is only partial. With the increase in the number of basal fertilizer application and the rotation of fertilization position, the nutrient status of the soil in the root zone of the blackberry can be fully improved.
Blackberries are native to the United States and have a short planting time in China. They have abundant sunshine in the Yang hilly region of Ningzhen, Jiangsu Province. The light energy is abundant. The annual precipitation is above 1000mm. There is great potential for the development of economic crops and fruit trees. Introduced the planting of blackberries. Because of the short time it takes to grow blackberries. The effect of fertilizers on their fruit is still relatively small. The experimental study on the effects of different fertilizer varieties and fertilization techniques on the yield, quality, and soil fertility of the blackberry is carried out. This article gives a preliminary report on the field trials and indoor analysis results in this area. . For the nutrients in the soil, a soil nutrient speed meter is used to determine the nutrient effect on the fruit.