Corn and sweet potatoes are also two crops that many people like to grow, most of the corn is planted fruit corn, and most of the sweet potatoes are transplanted with seedlings. But whether it is planting or transplanting, it should not be too early, but not too late, and it needs to be decided according to the local climate and temperature. Choose the temperature suitable for corn seed germination and seedling, sweet potato germination and rooting, if the temperature is not suitable, it will not only affect the seedling emergence rate, but also lead to rotten seeds and poor growth. So, when is it better to plant corn and transplant sweet potatoes? Let's take a look.
corn
Corn seed germination and emergence mainly depends on the soil temperature, generally the soil depth is about seven or eight centimeters deep, the temperature reaches more than 12 degrees, if the temperature is lower than 12 degrees, the seeds germinate slowly and are easy to rot seeds, and there will be uneven seedlings at that time. However, when planting corn in spring, the planting time varies greatly from region to region, and this needs to be determined according to the local climate, temperature and previous planting time. No matter what the region, it doesn't matter if spring is a little late, don't plant too early.
Under normal circumstances, the south of the Yangtze River is planted from late March to April, and most of Central China and North China are planted around mid-April, that is, Qingming to Guyu is the suitable sowing period. In the northeast, Inner Mongolia and northwest cold areas, it is planted in May after the valley rains. The above is the approximate corn planting time in various places, but this is not fixed, and it needs to be flexibly controlled according to the weather changes. If you encounter continuous rainy weather, you can postpone it for a few days and wait for a good day to plant again, so as to avoid continuous rainy days that lead to seedlings and rotten seeds.
Planting corn bottom fertilizer needs to be applied sufficiently, fertilizer can choose organic fertilizer, compound fertilizer, etc., when planting fertilizer into the planting ditch, or into the planting hole, but pay attention to the fertilizer must not touch the seeds, need to be isolated with soil, to avoid burning. Corn seed row spacing needs to be decided according to different varieties, such as planting some fruit corn, generally the row spacing is about 60 cm, and the plant spacing is about 25-30 cm.
sweet potato
Sweet potatoes prefer a warm environment and cannot tolerate low temperatures, because sweet potatoes are native to the tropics, and if they are planted and transplanted too early, the temperature is low and it is difficult to grow. The most suitable temperature for the growth of sweet potatoes is about 20-30 degrees, and it does not grow at all below 15 degrees, so it is not too early to transplant sweet potatoes in spring, and it can be planted and transplanted only after the valley rain. For example, in the Central Plains, North China and other regions, transplanting from April 25 to late May, and transplanting in the Northeast in mid to late May, this time period is relatively stable regardless of day or night, suitable for sweet potato germination and growth.
Transplanting sweet potatoes with seedlings requires certain skills, can not stand upright when transplanting, must be obliquely inserted into the seedlings into the soil, the greater the slope, the better, and can not be transplanted too deep, the base of the seedlings can be obliquely inserted into the soil 5-6 cm deep, and most of the seedlings should be in the soil, and only 2-3 leaves can be exposed on the ground. Again, when planting sweet potatoes, the base fertilizer can be fermented and rotted organic fertilizer, if there is plant ash, you can apply some plant ash, no plant ash, you can mix an appropriate amount of potassium fertilizer in organic fertilizer or compound fertilizer as base fertilizer.
It is best to choose sandy soil with good air permeability for planting or transplanting sweet potatoes, as the clay weight and compacted soil are not conducive to the growth of sweet potatoes and will deteriorate the taste. In addition, when the sweet potato grows to 50-60 cm long, it is necessary to control the growth in time to avoid the yield reduction caused by the growth of the seedlings.
The above is the specific planting time of corn and sweet potato, and various places can choose the appropriate time for planting and transplanting according to the local climate.