Rice field is an important measure to improve the soil structure of paddy fields, promote the rooting of seedlings, enhance the root activity of rice, enhance the toughness and lodging resistance of rice straw, control the ineffective tillering, increase the rate of ear formation, improve the microclimate in the field, and reduce the occurrence of rice diseases and insect pests. . However, in rice drying, it is necessary to master the "fire" to achieve the desired effect.
First, in the time of drying the field, we must adhere to the "when the seedlings are not equal, when the time is not waiting for the seedlings." The so-called "miao to unequal time" means that the seedlings (generally the total number of stems per acre reaches 20 to 250,000) must be sun-dried, and it is not necessary to wait until the rice grows and develops for a certain period of time. Due to the strong tillering ability of hybrid rice, it can still continue to divide till the beginning of the field. Therefore, the time for drying the rice should be properly advanced, and the field should be started when the total number of stems reaches 8 to 90% of the planned number of seedlings. The so-called "time to unequal seedlings" means that once rice is developed to the end of tillering to the beginning of young panicle differentiation, even if the total number of stems per acre has not yet reached the target, it is necessary to drain the fields in time. Otherwise, if you miss the opportunity, the sensitivity of rice to water will increase, so it is not appropriate to break the water and dry the field.
Second, in the degree of drying the field, it is necessary to look at the fields, see the seedlings, and watch the weather flexibly. Generally, the leaves are dark green, the fertile fields are strong, and the low-lying cold-impregnated muddy fields are to be re-dried; the leaves are green, the growth is general, the thin fields with little fertilizer are applied, and the dry fields with difficult irrigation are lightly exposed; Poor sand soil, the soil is easy to harden after drying, the soft clay field after rehydration, and Wangtiantian lacking irrigation conditions, it is not suitable for drying the field. The drying time is generally controlled in 5~7 days. The chicken claws are cracked in the sun to the surface, the leaves of the seedlings turn light, the leaves are straight as a sword, the feet are not wrapped in the feet, the feet are not trapped, the new roots are in the field, the old roots Go down to the degree. After the sun-dried field, it is necessary to re-water in time. At the same time, according to the growth of the seedlings, the urea should be chased by 2~3 kg of urea, until the water is not cut off before heading, and the rice panicle jointing is promoted.
This year, it is necessary to pay special attention to the fact that due to the continuous drought and lack of water, some rice has been “sucked in the fieldâ€, that is, it has not been in the field of sun-dried time. The field has no water layer, and some even have cracked fields, which makes rice tiller difficult and the number of seedlings is insufficient. In this case, shallow ploughing should be carried out on the paddy fields, the surface soil should be loosened, the capillaries should be cut, the soil water dispersion should be reduced, and the large-scale cracking of the field surface should be prevented, and the rainwater should be accepted. Once there is water, it is necessary to topdress in time to promote the growth of seedlings and reduce disaster losses.
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