Biology What is reasonable dense planting? What is the role of reasonable dense planting?

Reasonable dense planting refers to determining the appropriate planting density according to different conditions such as variety characteristics, climatic conditions, soil fertility, and production conditions. When determining the suitable density, it is necessary to determine the appropriate density range according to the characteristics of the variety, and then determine whether to use the upper or lower limit of the suitable density range according to the specific production conditions. Generally speaking, flat varieties are suitable for sparse planting, and compact varieties are suitable for dense planting. Varieties with long growth period are suitable for sparse planting, and varieties with short growth period are suitable for dense planting. Large spike varieties are suitable for sparse planting, and small spikelet varieties are suitable for dense planting. Tall stalk varieties are suitable for sparse planting, and dwarf stalk varieties are suitable for dense planting. Thin land is suitable for sparse planting, and fertile land is suitable for dense planting; Dry land is suitable for sparse planting, and irrigated land is suitable for dense planting.

The above principles should be flexibly grasped according to local conditions and specific conditions.

On the one hand, we should make effective use of arable area and grow as many crops as possible.

On the other hand, it is necessary to avoid too many crops, which will lead to excessive competition for nutrients, water and sunlight, resulting in poor growth.

Reasonable dense planting is to maximize the yield by adjusting the planting density and adopting reasonable plant spacing in these two aspects.

It is the number of plants planted per unit area. effective use of water, gas, fertilizer, light and other resources; The plant has a good effective space for growth and increases the yield.

In terms of unit area, the density of crops or trees should be appropriate, and the spacing between rows should be reasonable.

The function of reasonable dense planting is to maximize the yield by adjusting the planting density and adopting reasonable plant spacing. Reasonable dense planting is an effective way to increase the yield per unit area. Its main function is to give full play to the efficiency of soil, fertilizer, water, light, gas and heat, and to make the individual develop robustly and the group grow in harmony by adjusting the relationship between individuals and groups within the unit area of crops, so as to achieve the purpose of high yield.

Reasonable dense planting means that in the unit area, the density of crops or trees should be appropriate, and the row spacing should be reasonable. Generally, it is expressed by the number of plants (or holes) per mu. The number of plant spacing and row spacing is reasonable, and it must be determined according to natural conditions, the type of crop, the characteristics of the variety, and the level of tillage and fertilization and other cultivation techniques.

Reasonable dense planting is an important measure to increase crop yield.

Reasonable dense planting to increase yield

Yield per mu (kg) Number of spikes per mu Number of grains per spike 1000 grain weight (g) 1000. Theoretically, the heavier the number of ears per mu and the number of grains per panicle, the higher the yield of sorghum with a heavier 1000-grain weight. However, in production practice, the three factors are mutually restrictive.

Under the condition of sparse planting, the number of spikes per mu is less, the aboveground ventilation and light transmission are good, the underground fertilizer and water are sufficient, the individual is fully developed, the number of grains per spike is large, and the 1000-grain weight is high.

But because of the less, the output will not be high. In the case of over-dense planting, although the population is large and the number of spikes is large, due to the competition for light, water and fertilizer among individual plants, the number of grains per spike is significantly reduced, and the 1000-grain weight is reduced, and the high yield cannot be obtained. From Table 8, we can see the relationship between the number of spikes, grains per spike and 1000-grain weight and yield.

Only when the density is suitable and the three yield components are developed in harmony can a higher yield be obtained.

The above content refers to the Quick Understanding Encyclopedia - Reasonable dense planting.

Controlling the planting density when planting crops can effectively improve the final yield and quality of crops. When planting crops, reasonable dense planting can give full play to the efficiency of soil, fertilizer, water, light and temperature, so that the individual growth and development of crops can be better.

In addition, if the planting can be reasonably dense, the growth of the group will be more coordinated, and ultimately play a role in increasing yield.

When planting crops, reasonably increasing the density of red paper and expanding the leaf area can effectively increase photosynthetic products and improve the final yield of crops. If the planting density is too high, the leaves of the crops overlap each other, which will lead to poor light transmission and air permeability between plants, and the efficiency of photosynthesis will be reduced, and the yield will be reduced.

When planting crops, the planting density is too large, and the light between the plants is insufficient, which will lead to the phenomenon of plant growth, the internode growth at the base of the plant, and the stalk is relatively weak, and it is more likely to lodging, which affects the yield and quality of crops.

<> principle of reasonable dense planting is to use appropriate dense planting methods to allow plants to make full use of light energy through photosynthesis, so as to improve their photosynthetic efficiency and yield. Reasonable dense planting is an effective way to increase the yield per unit area, and its main role is that it can give full play to the efficiency of soil, fertilizer, water, light, gas and heat, and then adjust the relationship between individuals and groups in the unit area of crops, so that the individual development is robust, the group growth is coordinated, and finally the purpose of high yield is achieved.

The main purpose of reasonable dense planting is to allow crops to better absorb sunlight and water, and when the planting density is reasonable, the agricultural crops can absorb nutrients and heat in the soil more evenly, and can also achieve high yield in the later stage. Different cities have different soil quality and temperatures, and usually the characteristics and varieties of crops are adjusted to adjust the row spacing ridge pattern.

When planting crops, you often hear the word reasonable dense planting, what is the purpose of reasonable dense planting, the purpose of reasonable dense planting is to make crops better absorb sunlight and water, if the planting density is unreasonable, some plants can not get sun, there will be malnutrition, emaciation.

When the situation is serious, the yield of the plant will be greatly reduced, and when the planting density is reasonable, the crop can absorb the nutrients and heat in the soil more evenly, and the effect of high yield can be achieved in the later stage. Reasonable dense planting usually refers to planting crops that can make full use of the soil, or make crops grow better.

Reasonable dense planting to control the planting of row spacing and plant spacing, usually can be planted according to the characteristics and varieties of crops to adjust the row spacing, planting can also be according to the soil quality to control the row spacing, different urban soil quality and temperature is not the same, so the density of planting is also different.

In North China, it is best to control the row spacing at 35 40 cm and the plant spacing at 16 20 cm. Planting crops in Northeast China can control the row spacing at 53 66 cm and the plant spacing at 13 20 cm. If the soil nutrients for planting are insufficient, the row spacing and plant spacing can be appropriately reduced.