Soil organic matter refers to carbon-containing organic matter present in soil. It includes the residues of various animals and plants, microorganisms and various organic matters that can be decomposed and synthesized. Soil organic matter is an important component of the soil solid phase. Although the content of soil organic matter only accounts for a small part of the total soil, it is extremely important for soil formation, soil fertility, environmental protection and sustainable development of agriculture and forestry. effect.
According to different classification standards, the commonly used foliar fertilizers can be divided into the following types. According to product dosage form: it can be divided into two types: solid (powder, granule) and liquid (clear liquid, suspension). According to components: it can be divided into macroelement, medium element, trace element foliar fertilizer and water-soluble foliar fertilizer containing amino acid, humic acid, alginic acid, sugar alcohol and so on.
Any crop is born from the root and dies from the root. A strong and developed root system is the basis for crop growth and high yield. However, in the process of crop growth, sometimes the color of the root system of the crop will change. There is a saying: white roots are strong, yellow roots are life-saving, black roots are diseased, and gray roots are deadly.
In the face of increasingly serious soil problems, it is the choice of many vegetable farmers to make use of the summer shed rest period. The stuffing can not only effectively alleviate the problems of dead trees and nematodes, but also deep ploughing the soil before the stuffing can break the bottom of the plow and improve the soil permeability. After the shed is stuffed, a large amount of biological bacteria can be supplemented, which can quickly increase the number of beneficial bacteria in the soil and improve the soil ecological environment.
Watermelon is suitable for cultivation in loam or sandy loam. The best previous crop is wheat, spring corn and sweet potato, followed by cotton, followed by peanuts. Soybean stubble, vegetables and melon crops all have a bad influence on the growth of watermelon. Therefore, when planting watermelon, a soft loam should be selected, and the previous stubble should be a grass field crop.
There are three treasures in the northeast: ginseng, mink, and uran grass. Ginseng is also known as yellow ginseng, goblin, and divine grass. It is called "the king of all herbs". Ginseng likes a cool and humid climate, and is mainly distributed in the mountainous areas of eastern Liaoning and Jilin. The Changbai Mountains and the near-district mountainous areas in Heilongjiang and the forest areas in the Daxing'an Mountains of Heilongjiang, of which the output of Jilin Province accounts for about 70% of the total output. Ginseng can be divided into wild ginseng and garden ginseng. Wild ginseng is called "mountain ginseng", which mostly grows in rare virgin forests where broad-leaved forest and coniferous forest are mixed; Garden ginseng, that is, artificially cultivated ginseng, also known as "Ginseng".
