Ecological conditions for the growth and development of walnut

   soil is the main supply place of water and minerals for plants. Walnut absorbs water, organic and inorganic nutrients from soil through its huge root system. The quality of soil conditions directly affects the growth and fruiting of walnut.

   1, the thickness of soil layer walnut is a deep-rooted tree species, which requires a relatively thick soil layer, which should not be less than 1 meter. If the walnut grows too thin in the soil layer, its main root and lateral root are difficult to deeply root and develop, which affects the root system development, easy to form small and old trees, and easy to "scorch shoot" and can not bear normal fruit.

The picture shows walnut

   2. Soil pH walnut can grow in slightly acidic to slightly alkaline soil, but it is suitable to grow in neutral to slightly alkaline soil, that is, pH is 6.5 to 7.5. The soil salt content should be 0. 5%. Below 25%, slightly exceeding this limit will have an effect on growth and fruiting. Too much salt can lead to death, especially chlorate is more harmful than sulfate.

   3. Soil structure and soil fertility Walnut requires loose soil structure, strong water retention and good air permeability. The suitable soil for walnut is sandy loam and middle loam, if the soil is too clayey or barren sandy land is disadvantageous to the growth and fruit. Walnut likes calcium and should be cultivated in calcium-rich soil or fertilized with calcium fertilizer.

   walnuts like to be fat. According to the analysis, for every 100kg walnut harvested, 2. 7 kg of pure nitrogen is absorbed from the soil In a high-yielding orchard, 90% nitrogen is absorbed every 100 meters a year. 7 grams. Nitrogen fertilizer can increase the kernel yield, phosphorus and potassium can not only increase the yield, but also improve the quality of nucleolus. However, the appropriate amount of fertilizer application should be determined according to the specific growth and fruiting conditions of soil and trees. a little excess nitrogen fertilizer will prolong the growth period and delay fruit ripening, which is not conducive to safe overwintering. Increasing soil organic matter is beneficial to the growth and development of walnut.

   4. The topography of walnut is not strict, but the site conditions such as gentle slope, deep soil layer, leeward and sunny are more suitable, while shady slope, steep slope and windward side are not conducive to the growth and development of walnut. Walnuts should be planted on a gentle slope below 10 °.