642 results about "Dry land" patented technology

The invention belongs to the field of cucumber soilless culture method, particularly relates to a cucumber soilless culture matrix, and discloses a cucumber soilless culture method, which comprises steps of handling seeds; manufacturing the matrix and growing seedlings; planting and managing plants; and harvesting in good time. The matrix and nutrient solution are prepared by a user, mushroom residues and river sand or thoroughly decomposed wood chips and river sand are mixed by the volume ratio of 2:1 to form the matrix, and nutrition constituents required by various crops are mixed to form the nutrient solution according to needs. The cucumber soilless culture method has the advantages that culture of cucumbers is not limited by requirements of soil, the cucumbers can also be planted in barren and dry lands, fertigation is accurate comparatively and can be adjusted according to specific conditions of the crops, usage of chemical fertilizer and pesticide is reduced, and accordingly injury to human bodies and pollution to environments are reduced.

The invention discloses a method for restraining the discharge of nitrous oxide in a farmland, and the method is applicable to a paddy field and a dry land. The method comprises the following steps of: 1) production of biologic black charcoal by thermally cracking straws: collecting the straws of farm crops, atmospherically drying or airing the straws so that the moisture content of the straws is lower than 20%, thermally cracking and carbonizing the straws to obtain the biologic black charcoal, then grinding the biologic black charcoal, sieving the ground biologic black charcoal, and mixing and homogenizing the sieved biologic black charcoal to obtain the biologic black charcoal with particle diameters being smaller than 0.25 mm; and 2) soil treatment by virtue of the biologic black charcoal: after the preceding crops are harvested, uniformly spreading the biologic black charcoal on the surface of soil, plowing and harrowing the soil so that the biologic black charcoal is uniformly mixed in the soil of a plough layer, for the paddy field, after the soil treatment, irrigating and flooding water for 2-5 cm, transplanting paddies after 3-5 days, directly planting the crops in the dry land, and in the management measures of the farmland, keeping irrigation, fertilization and plant protection consistent with the management of a local farmland. By virtue of field observation in the growth period of the crops, the discharge of the N2O (nitrous oxide) in the soil in the paddy fields in the Taihu plain and the dry lands in the Huang-Huai-Hai plain for the crops such as the paddies, corns and the like can be respectively reduced by 31%-58% and 11%-42%.