First, timely use of mechanical deep loose ridges

To implement the corn planted by the strip ridge card, install a deep loose shovel (rod) on the modified cultivator, 1~2 times in the middle of the deep pine ridge in the seedling stage, the slope in the mountainous area is large, and the land with heavy soil erosion is generally not needed. Deep pine, only use 耘锄 for mechanical shallow soil weeding. The depth of the deep pine in the plain area is 20~25 cm, and the depth of the plain is 15~18 cm. If the soil continues to dry, it will not be loose or shallow.

Second, timely scientific topdressing

First of all, we must master the timing of fertilization. The number of topdressing should be determined according to soil fertility, fertilization amount, bottom and mouth fat. Some can do the attacking of the attacking and blasting once in the big trumpet period, and can also be applied twice in the jointing and big trumpet period. In the later stage, the soil that is easy to be de-fertilized can be less chased by a bit of attacking fertilizer, so as to avoid excessive tantilization and cause late-ripening of the greedy and green. Secondly, pay attention to the fertilization method. Corn belongs to deep root crops, and the fertilization method varies from place to place. The roots of the crops are fattening, and the strongest part of the fertilizer is the root tip. The fertilizer should be applied to the wet soil layer that is most easily absorbed by the roots. After deep application, it must be covered in time. In order to prevent the loss of nitrogen and the burning of seedlings, deep application is an important measure to prevent nitrogen loss and volatilization, and to make the fertilizer fully adsorbed by the soil, reduce the loss and increase the utilization rate of nitrogen fertilizer. Third, it is not advisable to irrigate the urea immediately after the application of urea, because the amide nitrogen contained in the urea cannot be directly absorbed by the crop, and must be converted into ammonium nitrogen by the action of the soil microorganisms before being used. If the water is immediately poured after purging the urea, it will be dissolved by water. Because the adsorption between the soil colloid and urea is very weak, the urea has great fluidity in the soil and will be leached to the deep layer to reduce the fertilizer efficiency. In addition, appropriate control of the amount of topdressing, corn topdressing should be based on soil fertility and planting density.

At present, due to mechanical constraints, mechanical topdressing can only be carried out before the ridge is closed in the early stage of jointing. It is necessary to carry out the necessary modification of the top dressing machine and install the field fertilizer applicator to meet the requirements of field dressing and topdressing. Generally, the top dressing should be applied to the inside of the two rows of corn on the strip. When the amount of fertilizer is large, it can be chased on both sides. The roots are 10~15 cm and the trench is topdressed. The depth of application is 8~12 cm. The back dressing machine should be equipped with a reclaimer. It will flatten the fertilizer and prevent the loss of water and nutrients.