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Impact of High-Temperature Heat Damage on Rice Production in Fanchang County and Defensive and Remedial Measures
In the process of rice production, the climate factors with the greatest impact and the hardest to control are temperature and water. Reasonable irrigation can supplement and regulate water, but temperature is difficult to control, and it exerts a major influence on the entire life of rice. Rice is the main crop in grain production in Fanchang County, ranking first among grain crops in both planting area and total output. At present, the rice planting area in Fanchang County is about 16,360 hectares (including the multiple cropping index), of which about 13,191 hectares are middle-season indica rice (mainly hybrid rice), about 1,514 hectares are early rice, and about 1,655 hectares are double-cropping late rice.
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Division of Rice Production Regions in Guangdong and Analysis of the Characteristics of Each Region
Guangdong Province is bordered by the Nanling Mountains to the north and the South China Sea to the south, with vast rice-growing areas; rice is cultivated from tidal fields at sea level to mountain terraces at an elevation of one thousand meters. Guangdong has a monsoon subtropical and tropical climate. The safe growth period for rice is 220-280 days in most places. The rice-growing season is long; for example, in Guangzhou the early rice is generally sown in early March and harvested in mid-July; typical late rice varieties are sown in late June, reach full heading around October 10, and are harvested in mid-November; the "fanqiu" (second cropping of early rice) reaches full heading in early to mid-July. Abundant rainfall and long sunshine hours are all conditions favorable to rice growth.
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What causes soybeans to produce many flowers but few pods?
At present, many farmers growing soybeans have found that in some plots the soybean plants produce many flowers but few pods. The reasons can be found through a "five checks." First, check the soil structure and analyze whether the soil pH value is too high, and whether the field has been repeatedly cropped with soybeans or is a continuous cropping field; second, check the fertilizer content and analyze whether the ratio of nitrogen, phosphorus and potassium in the applied chemical fertilizer is reasonable; third, check the planting structure and analyze whether the planting density is reasonable; fourth, check the plant roots and analyze whether pests and diseases have occurred on the roots; fifth, check the soil moisture and analyze whether the moisture content is too high or too low, since both excessive drought and excessive waterlogging will affect the pod-setting rate. Only by carefully
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How to observe the life history of sexual reproduction in Gastrodia elata
The seeds of Gastrodia elata are composed of an embryo and a single layer of cells, with no endosperm. The seeds are very small, averaging 0.69 mm in length and 0.14 mm in width, with the embryo averaging 187 micrometers in length. When sown in early June, half a month later the embryo cells begin to differentiate, the embryo diameter increases noticeably, the middle of the seed swells, the suspensor is dark in color, and the newly differentiated cells at the apex of the embryo are light in color; then the seed coat ruptures at this end, and the embryo breaks through the seed coat. July happens to be the rainy season in the production areas, with soil temperature around 25°C and soil moisture around 60%. The Gastrodia elata seeds germinate one after another, and 26 days after sowing they grow to a length of
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Detailed Guide to Blue Lily Cultivation and Cut Flower Production Techniques
Operating Procedures for Blue Lily Cultivation and Cut Flower Techniques 1. Seedling raising: Blue lilies are mainly propagated by division, but can also be grown from seed. (1) Division propagation: When blue lilies grow to a certain stage, their tiller shoots emerge from the apical buds of branches on the horizontal underground stems. The tiller shoots and the mother plant's leaf clusters grow separately, making division easy. Simply cut apart the underground rhizomes connecting the tiller shoots and transplant them. Division can be done year-round, but is generally chosen in March to April each year. For potted plants, division is done together with repotting. The method is to
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Detailed Explanation of the Reproductive Organs and Physiological Characteristics of the Female Fox
The reproductive organs of the female fox consist of the ovaries, fallopian tubes, uterus, vagina, and external genital organs. The external genital organs include the vestibule of the vagina, labia, and clitoris. The ovaries of the female fox are located at the third and fourth lumbar vertebrae, at the posterior margin of the kidneys. The left ovary is positioned more anteriorly than the right ovary. The ovaries are flat in shape and grayish-red; during estrus, the ovary is 2 cm long and 1.5 cm wide; the fallopian tubes are 5-7 cm long. The ovaries and fallopian tubes are covered by adipose tissue. The uterus is a bicornuate uterus, with the uterine horns and uterine body suspended by the broad ligament of the uterus on the lower lateral walls of the pelvis. The uterine horns are 10-13 cm long, the uterine body is 4-6 cm long, and the cervix protrudes into the vagina. The vagina is 6-8 cm long, with its anterior end connected to the cervix and its posterior part adjoining the urogenital vestibule. The vestibule has two relatively well-developed protrusions, mating. During mating, the vestibule is stimulated and contracts violently, the two lateral protrusions swell, and together with the bulbous body of the male fox's penis, this results in a copulatory tie. The vulva of the female fox, together with the bulbous body of the male fox's penis, results in a copulatory lock. The vulva of the female fox is round on top and pointed at the bottom; outside the breeding season it is covered by pubic hair and not visible; during the breeding season it shows morphological changes.
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Detailed Explanation of the Production Techniques and Methods for Seedless Candied Jujubes
1. Ingredients: 50 kg dried red jujubes, 30 kg soft white sugar, 100 g citric acid. 2. Key operating points: (1). Select milky-white stage jujubes that are large, have small pits, thick flesh and thin skin, and sort them into 3 grades - large, medium and small - for processing separately. (2). Sharpen one end of an iron tube 6-8 mm in diameter, pierce it in from one end of the jujube, and when pulling it out, bring the jujube pit out with it. With continuous operation, the pits are constantly pushed out from the other end of the iron tube. (3). Soak the pitted jujubes in clean water for 12 hours,
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How long does the transmission of porcine reproductive and respiratory syndrome virus persist?
The porcine reproductive and respiratory syndrome (PRRS) virus has an enormous impact on the economic benefits of the global pig industry. This disease increases mortality and reduces pig production performance and growth rate, and increases the cost of vaccines and medications. Although many prevention and control measures have been proposed, their effectiveness after implementation still varies, so these measures are not suitable for some pig farms. The PRRS virus has long-lasting infectious pathogenicity and can spread both horizontally and vertically. Fetuses in the uterus and pre-weaning piglets are infected by this virus late, and it can spread throughout the entire piglet barn through virus-contaminated bedding.
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Technical key points for restoring tea production after snow disaster and freezing damage to tea plants
This year, some tea regions across the country experienced severe weather such as heavy snow and low-temperature freezing that had not occurred in decades, causing tea branches to break, leaves to discolor and dry up, and branches to die, resulting in varying degrees of snow disaster and freezing damage. In order to restore tea production as quickly as possible and reduce the economic losses of tea farmers, the following technical key points are proposed according to the disaster conditions. 1. Pruning 1. Mild freezing damage (only leaves damaged): do not prune or lightly prune as appropriate. 2. Moderate freezing damage (production branches damaged) and severe freezing damage (framework branches damaged): prune when the boundary between the frozen-dead part and the healthy part is clear,
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Cotton planting method reform should be combined with autumn sowing production
In recent years, to promote high cotton yields, the Ministry of Agriculture of the People's Republic of China has carried out a 10,000-mu high-yield cotton creation activity in the major cotton-producing provinces nationwide. Recently I inspected high-yield cotton fields in Hubei, Anhui, Jiangsu, Jiangxi and other provinces, and previously also conducted surveys in high-yield cotton fields in Hunan and Zhejiang provinces. The high-yield cotton creation goals are broadly the same across regions, but the planting patterns are not entirely the same, and the planting methods each have their own particularities. Cotton yield is composed of indicators such as planting density, number of bolls per plant, boll weight and lint percentage, among which planting density is closely related to cotton yield, and planting density
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