Influence of the previous crop and soil fertility on potato yield

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Аннотация

A crop rotation system has consists of various benefits such as reducing soil erosion and increasing fertility and crop yield. The experiment was conducted on the irrigation field of the formal potato seed multiplier Company “Elite seed” from 2015 to 2018. The main purpose of the research is to multiply the types of crops that are part of the potato rotation, to improve the structure, to investigate and determine the effect of the crops grown in rotation on the physical, chemical, and biological quality of the soil and how well they are to the next crop, and to solve the problems of crop development. Four types of potato rotations were included in the study, and in increasing seed potato yield and soil fertility green manure fallow — potato — wheat rotation or green manure had better benefits than other rotations (green manure plowing in the field in July). Soil samples were taken from 0-20 cm depth before the planting and after the harvest of potatoes each year. According to the results of the soil analysis of the experimental field, the humus content of the green manure fallow soil increased by an average of 0.35% with an improvement from another previous crop. Moreover, in the soil of green manure fallow the amount of nitrogen easily used by plants was 0.3-0.8 mg/kg (spring), which had a good effect on the yield of the potato crop planted the following year. The result of the experiment shows that the use of green manure fallow as a rotation with potatoes will improve the yield and quality of potatoes, therefore, this method is highly recommended in the future.