What are the characteristics of clay soil, and what crops are suitable for planting in it?
What are the characteristics of clay soil? What is suitable for planting? Clay soil is a type of soil with a low sand content, fine particles, a slow seepage rate, good water retention, and poor aeration. If clay soil is very moist clay soil, wetland plants can be planted: reeds, cattails, purple loosestrife, arrowhead, Alisma plantago-aquatica, etc.
The tillage layer of clay soil is soft and loose, with a moderate soil texture, good structure and permeability, suitable tilth, and rich in plant nutrients. Below are the plants suitable for planting in clay soil, carefully compiled for you by the editor of Xuexi La. Let us take a look together.
Plants suitable for planting in clay soil
Clay soil is suitable for planting lotus, honeysuckle, reeds, banyan trees, crape myrtle, willow trees, rice, arrowhead, wheat, broad beans, and so on.
Methods for planting rice
1. The purpose of rice tillage and land preparation is to create a good soil environment for the development of the rice root system through various means such as plowing and harrowing. This allows rice seedlings to develop rapidly after transplanting, quickly absorb water and nutrients, establish themselves quickly, and tiller early, quickly forming a high-yield seedling structure.
2. For cultivation row direction, an east-west row direction is generally superior to a north-south row direction, which is related to the sun rising in the east and setting in the west. The east-west row direction is mainly manifested in the following ways: first, it improves the light-receiving condition of rice plants and increases photosynthetic efficiency. Second, it improves the field microclimate, which helps raise the water temperature and soil temperature of the paddy field and promotes the growth and development of rice plants.
3. The quality of rice transplanting has a great impact on seedling rooting, the speed of greening, the earliness or lateness of tillering, and the level of yield. Attention should be paid to shallow, straight, uniform, and stable transplanting, including mechanical transplanting. The advantage of shallow transplanting is that it can place the rooting nodes in the shallow soil layer where the soil temperature is higher, which is conducive to nutrient absorption and growth and development of the root system and can promote the occurrence of tillering.
4. When paddy fields are planted year after year, every year they not only absorb large amounts of trace elements such as N, P, and K from the soil, so relying only on inorganic fertilizers cannot meet the needs of rice production. Organic fertilizers and inorganic fertilizers must be applied in combination.
5. Timely early transplanting means transplanting early within the transplanting period. Timely early transplanting can promote early growth and rapid development and prolong the vegetative growth period of rice. Especially for late-maturing varieties, they can obtain sufficient tillering. Only by combining timely early transplanting with sowing to cultivate strong seedlings and reasonable sparse planting can higher yields be obtained. Generally, early transplanting is done around mid-May.
6. Modern high-yield rice cultivation all emphasizes sparse sowing to cultivate strong seedlings. With good seedling quality, rooting after transplanting is fast. Whether early, middle, or late rice, there is no need to irrigate with deep water to protect the seedlings after transplanting. The best method is shallow-water plowing and leveling, shallow-water transplanting, and after transplanting for 5-7 days, letting the field water drain naturally. In this way, the base fertilizer applied is not easily lost, gas exchange is also relatively coordinated, and shallow-water frequent irrigation is practiced, coordinating water and air, regulating fertilizer with water, and promoting roots with air, which is conducive to the mutually promoting development of roots and tillers.
7. As the saying goes, “Plant the May field, do not transplant the June seedlings.” For transplanted rice, due to transplanting injury, after transplanting it must go through a period from growth stagnation to gradual recovery of growth, namely the greening period. It generally takes 5-7 days. For single-season rice, tillering begins about 10 days after transplanting, reaches the peak tillering stage within 20-25 days, and reaches the maximum tillering stage within 30-35 days. Generally, the whole field tillering period is about 20 days, while the effective tillering period capable of producing panicles is very short, only 5-10 days, with the longest reaching about 15 days. Rice growth during the tillering stage is manifested in two aspects. First, the aboveground part grows leaves and tillers. Second, the underground part grows roots and forms a robust root system. Due to the differentiation and growth of a large number of vegetative organs, more nitrogen nutrition is needed, and the growth characteristics dominated by nitrogen metabolism are shown in the rice plant. Therefore, it is also called the growth period. The rice plant develops vigorously and absorbs much nutrition. It is the key period for promoting early tillering and cultivating robust large tillers. The sprouting, elongation, and various physiological activities of rice roots all require sufficient oxygen.
8. The jointing and panicle growth stage has the greatest water demand, and the water needs of rice must be guaranteed. However, when rice enters the panicle growth period, the temperature is generally relatively high, the decomposition of organic matter accelerates, microbial activity is vigorous, and oxygen consumption is high, which easily causes the accumulation of toxic substances and is not conducive to root growth. This in turn requires that the field not be flooded for a long time. Therefore, in water management during the jointing and panicle growth stage, good aeration should be maintained, and a shallow water layer should be properly established in the later stage. The water management method of not letting old water dry up and not letting new water enter is adopted to coordinate aboveground and underground growth until maturity. Especially for large-panicle varieties, the grain-filling and ripening period is long, so it is even more unsuitable to cut off water too early, so as to avoid reducing yield. After yellow ripening, the physiological water demand of rice decreases. Generally, about 7 days before harvest, the water is drained to dry the field to facilitate harvesting.