Agricultural Products Lists
-
Absorption of nutrients by Rice at different growth stages
The absorption of nutrients in different growth stages of rice varies greatly with different types. The growth period of double cropping rice is short, especially the vegetative growth period in the field is shortened, and the vegetative growth and reproductive growth overlap shortly after transplanting. That is, panicle differentiation began at the same time of tillering in the field, and entered the peak tillering stage in the process of panicle differentiation, so a prominent fertilizer absorption peak was formed at 2-3 weeks after transplanting, and two fertilizer absorption peaks were formed for single-cropping rice at 2-3 weeks and 7-9 weeks after transplanting. The absorption rate of all kinds of nutrients by rice reached before heading.
2019-01-16 -
What is the reason why rice does not bear fruit?
It is understood that in the budding and heading stage, rice is extremely sensitive to temperature, the most suitable temperature is 25 to 30 degrees Celsius, more than 30 degrees Celsius will have an adverse effect. In the case of continuous high temperature above 35 degrees at booting stage, the floral organ of rice will be underdeveloped, the pollen will be stunted and the vigor will decline. If there is a continuous high temperature above 35 degrees in the heading and flowering stage, heat damage will occur, which will affect the rupture of pollen and the elongation of pollen tube, resulting in the formation of empty shell grains due to inability to fertilize, resulting in what farmers call flowering and fruiting.
2019-01-16 -
Application of Zinc Fertilizer to Rice to prevent "sitting"
Rice seedlings do not grow long after transplanting, or even do not turn green, or do not tiller or even shrink after turning green, which is generally called "sitting". Most of the "sitting" fields appear in low-lying shady and humid areas and cold rotten and thin fields, but sometimes fertile fields also occur. There are many reasons for this phenomenon, and zinc deficiency is one of the most important reasons. The symptoms of zinc deficiency in rice are as follows: the leaf tip of the basal leaf of rice plant is dry, irregular patches of yellowish brown or even reddish brown appear in the middle of the leaf, and gradually from the old leaf.
2019-01-16 -
The nemesis of rice disease-- 12% rice power
12% rice power EC (12% green copper EC for rice) is a special fungicide for rice. According to the large-scale demonstration and popularization in Hunan, Hubei, Guangxi, Zhejiang and other major rice producing areas, it has a good control effect on many kinds of fungal and bacterial diseases, such as rice bacterial leaf spot, bacterial leaf blight, rice false smut, rice blast and so on, especially for bacterial leaf streak. the effect is significant. Rice power is a low toxic pesticide, which can be degraded rapidly under natural conditions, has no residue, no pollution, and is safe to human, animal and environment.
2019-01-16 -
Rice disease
1. Rice blast (1) damage characteristics: Rice blast, also known as rice fever, commonly known as fire blast, hanging head blast, neck-choking blast and so on, is one of the most popular and harmful fungal diseases in the world, which mainly harms the aboveground part of the host plant. Due to the different damage period and position, it can be divided into seedling blast, leaf blast, ear neck blast, branch blast, grain blast and so on. The host range is many kinds of Gramineae plants, such as rice, wheat, horse tang and so on. Magnaporthe grisea overwintered mainly on diseased rice straw and was infected in rice field in the second year. The spread of bacteria mainly depends on the wind.
2019-01-16 -
Symptoms of rice virus disease
The damaged plants were dwarfed and the leaves changed color, their growth declined, and the leaves were orange to yellow in color. The disease of indica rice is mostly orange or slightly reddish, also known as red leaf disease. The young leaves are mottled and the old ones are mottled. At present, 11 kinds of rice virus diseases (including two kinds of mycoplasmic diseases) have been found in China. they are common dwarf disease, yellow leaf disease, striped leaf blight, black streak dwarf disease, Verticillium wilt, grass dwarf disease, cluster dwarf disease, sawtooth leaf dwarf disease, orange leaf disease, Donggler disease and tumor dwarf disease. Rice common dwarf disease and yellow leaf disease are harmful in southern China.
2019-01-16 -
Pollution-free control techniques of rice diseases and insect pests
Agricultural control is the basis of pollution-free control of rice diseases and insect pests. Its basic principle is to create an environment conducive to crop growth and growth but not conducive to the breeding of diseases and insect pests. 1. Increasing the application of organic fertilizer and gradually reducing the application amount of chemical fertilizer are one of the important reasons for the serious occurrence of rice diseases and insect pests. Therefore, we must change our concepts, attach importance to the development of animal husbandry, plant green manure and accumulate all kinds of farm manure, and establish an organic system.
2019-01-16 -
Integrated control techniques of rice diseases, insect pests, weeds and rodents
1. Suitable areas: Rice areas of Guangdong Province. The rodent damage control technology is suitable for rodent control in agriculture, forestry, aquaculture and cities and towns in Guangdong Province. 2. Key technical points of rice pest control: (1) Agricultural control: A. Select pest-resistant, high-yield and high-quality varieties. b. Sowing and transplanting at the right time. c. Reasonable close planting and fertilization. 40 plates (560 holes) per mu are suitable for throwing seedlings, and about 20 000 clumps (6X5 inch) per mu, that is, about 8-100000 seedlings per mu are suitable for planting. Base fertilizer advocates more application of organic fertilizer, appropriate amount in the early and middle stages according to soil fertility and yield.
2019-01-16 -
Standardized fertilization techniques for Rice
Implement balanced fertilization according to the fertilizer requirement law of each crop, soil nutrient supply status and fertilizer effect, determine the corresponding fertilizer application amount and fertilization methods. Based on the principle of the combination of organic fertilizer and inorganic fertilizer and the combination of base fertilizer and topdressing fertilizer, balanced fertilization was realized. 2. Implement harmless organic fertilizer the organic fertilizer produced by farmers must go through ripening and fermentation, carry out harmless treatment, and kill pathogenic microorganisms, insect eggs and weed seeds. Prohibition of the use of industrial waste, municipal waste and sludge and failure to achieve
2019-01-16 -
Technical advice on rice field chemical elimination
Rice field chemical elimination is the key link to achieve high and stable yield of rice. There are mainly three kinds of weeds in rice fields in our county: grass weeds such as barnyardgrass, Euphorbia chinensis and crabgrass, broad-leaved weeds such as clematis, Potamogeton rotundus and Aegilops tauschii, as well as Cyperaceae weeds. In recent years, due to the variety of rice planting methods in our county, great changes have taken place in the grass phase of paddy fields: firstly, some malignant weeds in paddy fields have an upward trend, except for barnyardgrass, which still occurs widely and in large quantities, and there are obvious upward trends in sphagnum chinense and cyperus seu.
2019-01-16 -
Management techniques in the later stage of Honda Rice
1. Water-saving irrigation technology during rice growth period, water-saving technology should be adopted for irrigation and drainage according to the water demand characteristics and requirements of rice growth stages, which can be divided into deep water turning green, shallow water tillering, deep water booting and heading, diving maturity. In the period of returning to green, because the root of the seedling is damaged, the absorption of water is less, and the leaf evaporation is large, the seedling must turn green in deep water after transplanting. In order to prevent physiological water loss, the water depth is about 2 to 3 centimeters. If the irrigation is too deep, the nutrients decompose slowly, which is disadvantageous to the tillers; the booting and heading stage is the largest water requirement of rice in its lifetime.
2019-01-16 -
How to remedy the flooding of rice
When the paddy field is flooded below 25 ℃ for 1-4 days, it will not do much harm; when it is flooded for 1-4 days above 30 ℃, it will lead to abnormal fruiting of rice; when it is flooded for 1-4 days above 40 ℃, it will cause rice to die and lose its harvest. Rice is flooded at the seedling stage, the seedlings are slender, the leaves are yellow, and it is generally difficult to recover; at the tillering stage, the bottom leaves are necrotic, the heart leaves are curled, and the leaves wither after water retreat, but generally do not rot; at the jointing stage, the plant is thin and weak, and it is easy to lodge and break; at booting stage, the resistance is the weakest, it is easy to appear rotten panicles and deformities, and the seed setting rate decreases; at filling stage, the bottom leaves are withered and yellow, the top leaves are yellow, and ears are yellow.
2019-01-16 -
Advantages of semi-arid rice cultivation
Semi-dry cultivation refers to a new rice planting method, which is to plant rice in paddy field according to certain specifications, plant rice on the water line or box surface on both sides of the ridge top, irrigate the furrow, adjust the water level according to different growth stages of rice, and implement infiltration irrigation. According to the ecological characteristics of farmland, it is a new rice cultivation technology which is experimentally researched by applying the principle of natural no-tillage and the theory of soil biological thermodynamics. It is suitable for winter paddy field, especially for deep foot field, cold soaking field, muddy field and large fertilizer field. Over the years, the area has expanded rapidly. 198
2019-01-16 -
High-yielding cultivation techniques of semi-arid rice
① Soil preparation, ridging and winter paddy field ploughing in time after rice harvest, raking and leveling the field surface, building high field ridges and storing water for winter. After spring generally no longer plow harrow, but soil hardening and weeds more than the field block, half a month before planting should plow harrow once. Ridging is carried out twice. The first time is carried out 5~7 days before planting. The rope is pulled according to the specification to make coarse ridges (deep feet, 7~10 days before planting in muddy fields). It is not too early to avoid long exposed ridge surface and easy breeding of weeds. The second time is carried out 2~3 days before planting. According to the quality requirements, the ridge (compartment) surface is further raised and cleared.
2019-01-16 -
Rice leafhopper with white wings
The scientific name ThaiarebiginosaKuoh was mistaken for Eryfhroneurasubrufa (Motsulsky) belonging to Homoptera, Cicadellidae. It is distributed to the south of the Yellow River and east of Xichang, Sichuan. Yunnan, Guizhou, some mountainous areas of Sichuan and Hanzhong of Shaanxi suffered heavily. Host rice, wheat, barley, sugarcane, English white, corn, rape and so on. With the characteristics of damage, the nymphs sucked the sap of the leaves, and the damaged leaves appeared sporadic white spots at first, and then connected into dotted stripes, or white stripes were the most.
2019-01-16 -
Control of rice white-backed planthopper
Symptoms of damage: sucking juice at the base of rice plants inhabited by adults and nymphs, resulting in chlorosis and yellowing of leaf tips, serious withering of the whole plant, difficulty in heading, withered booting or brown panicles at panicle stage, and blighted grain. Morphological characteristics: adults can be divided into two types: long wing type and short wing type. The long-winged adult is 4-5mm long, grayish yellow, the top of the head is narrow, protruding in front of the compound eye, there are three protruding longitudinal ridges on the face, the ridge color is light, the groove color is deep, black and white, and there is a pentagonal white or blue-white spot in the center of the chest and back shield.
2019-01-16 -
Rice white-backed planthopper
Host rice, English white, corn, barley, wheat, sugarcane, sorghum, barnyard grass, Kentucky bluegrass and so on. The damage characteristics are the same as those of brown planthopper. Morphological characteristics the long-winged male is 3. 2-3.8mm long, light yellow with black and brown spots. Protrusion of the top of the head, forechest, middle chest dorsal plate lateral ridge external compound eye with 1 crescent dark brown spot, middle chest dorsal plate side area dark brown, middle yellow longitudinal band, front wing translucent, end brown halo spot; wing disease, face, chest, abdomen ventral dark brown. The long-winged female has a body length of 4mur4.
2019-01-16 -
How to judge zinc deficiency in rice?
Zinc deficiency in rice generally occurs at the seedling stage. The symptoms are chlorosis and albinism at the base of the new leaves, small leaves, sometimes albino heart leaves, chlorosis or albino stripes in the old leaves, and brown stripes on both sides of the middle ribs. The plant is short, the leaf occipital spacing is shortened, the tiller decreases or does not tiller, the root seedling is weak, the white root is few, the floret sterility rate increases, the heading delay or even no heading, and the mature stage is delayed.
2019-01-16 -
How to produce high-yielding rice seedlings
Rice is the main food crop in the south and west of Shandong Province, which has high yield and strong commodity, but the income of farmers in the rice area has been affected because of the disorderly varieties and serious diseases in recent years. Therefore, it is necessary to implement various rice seedling techniques to lay a good foundation for high yield and bumper harvest of rice. First, select high-quality varieties. Although Yujing 6 has poor disease resistance, it has good quality, strong photosynthetic efficiency, compensation capacity and high yield, so it should still be the leading variety this year, which can be planted with Lindao 11, Zhendao 88 and Shengdao 80.
2019-01-16 -
How to choose rice varieties scientifically
How to select rice varieties scientifically, we should follow the following principles: (1) approved varieties with strong resistance. (2) large-scale planting of a single variety should be avoided in the same village and town, and four varieties of 3muri should be planted together. (3) as the climatic conditions this year are not very favorable, varieties with earlier maturity should be selected. (4) choose the varieties sold by regular manufacturers. It is best to buy seeds from the breeding unit, because the breeding unit knows the characteristics of the variety and adapts to the region. The seed purity is good.
2019-01-16