New shed vegetables, careful nutrient deficiency

“The same management, why is the difference in the vegetables that are grown out of them?” Master Zhao of Shouguang City, Shandong Province, was puzzled. On the same land, the eggplant in the north greenhouse is strong and the vegetables in the greenhouse on the south side are of different heights, and the yield is less than the former. In order to find out the roots, Master Zhao often communicated with neighboring peasants, and inadvertently chatted. He suddenly realized that although the two greenhouses were in the same area, due to the distance difference of 200 meters, the soil in the southern greenhouse was slightly sandy, plus It is a new greenhouse, so although it is managed in the same way, the new shed leaks water and the old shed contains enough organic matter. As a result, the same amount of organic fertilizer is slightly insufficient in the new greenhouse fertilization.

After the problem was identified, Master Zhao decided to conduct a soil testing and fertilization process, accurately grasp the values ​​of various indicators in the soil, and then targeted them to conduct a reasonable cure. He collected soil samples as required and sent them to the Shouguang Soil and Fertilizer Testing Center for testing. The results showed that many indicators in the soil were unqualified, mainly due to insufficient nutrient content. (North Vegetable)

Expert analysis

The greenhouse has low organic matter content, low soil hydrolyzable nitrogen content, low available phosphorus content, and suitable content of available potassium; soil acidity and salt content are not high; soil chlorine ion content is low and sodium ion content is not high; soil exchange The calcium content is adapted and the exchangeable magnesium is too low; the soil available sulfur is too low.

Editor's advice

1. Chong Shi 20 ~ 10 ~ 20 sulfur-based water-soluble fertilizer, 25 kilograms per acre, magnesium sulfate 10 kilograms, continuous flushing 5 times, can be used in conjunction with the application of high organic matter content of humic acid and other organic water-soluble fertilizers.

2, Chong Shi 25 ~ 5 ~ 20 of the water-soluble fertilizer, each producing 1,000 kilograms of vegetables per acre every time pure nitrogen fertilizer 3 ~ 4 kg.

3, before the cultivation of vegetables under the chin, should pay attention to the basic application of calcium magnesium phosphate 100 kg, supplement the effective magnesium content in the soil, and properly raise the pH value of the soil.

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