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Management Measures and Technical Points for Rice during the Jointing and Panicle Elongation Stage
The jointing and panicle elongation stage refers to the period from jointing and the beginning of young panicle differentiation to just before heading, generally 25-36 days for middle-season rice. 1. Growth and development characteristics and growth appearance during the jointing and panicle elongation stage (1) Growth and development characteristics During this period, on the one hand, stem elongation is the center, completing the growth of the last few leaves and root system and other vegetative organs; on the other hand, reproductive growth centered on young panicle differentiation takes place. During this period some tillers gradually die, and the total number of stems and tillers declines compared with the earlier stage, so it is an important period for preserving tillers and increasing panicles. From
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Comprehensive Prevention and Control Methods and Technical Key Points for Porcine Respiratory Disease Syndrome
This disease is characterized by occurring throughout the year, in an endemic pattern, affecting pigs of all ages, mostly at 13-20 weeks of age, with a course of 2-8 days and a relatively high mortality rate. Symptoms: affected pigs show elevated body temperature of 40.5°C-42°C, depression, reduced or absent appetite, difficulty breathing, sometimes coughing, pale visible mucous membranes, pale or purplish skin, constipation or diarrhea, abortion and stillbirth in pregnant sows, and neurological symptoms in suckling piglets with high mortality. Pathological necropsy: necropsy of 6 dead pigs and 2 severely ill
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Key Technical Points for Spring Sesame Cultivation with Plastic Film Mulching
Plastic film mulching cultivation can bring sesame yields to over 150 kg per mu, and some can exceed 200 kg, so film mulching is an effective cultivation measure for achieving super-high sesame yields. The specific techniques are introduced as follows: 1. Seed selection and timely early sowing: After plastic film mulching, the effective growth period of sesame is extended. Therefore, mid-to-late maturing excellent sesame varieties with waterlogging tolerance, disease resistance, and high yield potential should be selected, such as Yuzhi No. 5, No. 7, No. 8, and sesame hybrids. Early sowing is suitable, with a sowing period from the end of April to early May, to fully utilize the growing season and increase sesame yield. 2. Land preparation
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Key Technical Points for Cotton Management in the Mid-to-Late Growth Stage
"Major Heat" has passed, and "Start of Autumn" is approaching. Cotton in the southern Hebei region has entered the peak period of full flowering and boll setting. The main problems currently are: first, due to excessive rainfall in the earlier period and delayed chemical regulation, some fields are growing too vigorously with excessively tall cotton plants; second, due to recent sustained high temperatures, aphids, red spider mites and other pests have broken out more severely in some cotton fields, adversely affecting cotton growth. Currently it is the cotton flowering period, which is also the critical period for mid-to-late stage cotton management. In view of this year's climate characteristics, seize the favorable opportunity, adapt measures to local conditions, provide classified guidance, and effectively
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Key technical points for mid-season management of cotton during the Major Heat solar term
Focus on promoting growth, combining promotion with control, achieve control of large seedlings, promotion of small seedlings, and supplementation of weak seedlings, promote the transformation of weak seedlings, achieve balanced growth of strong seedlings, and build a high-yield framework early. Scientific fertilizer and water management: First, apply bud fertilizer early and steadily. For weak seedlings, apply bud fertilizer early and steadily, generally applying 5-7 kg of urea per mu, and 25-50 kg each of cake fertilizer and phosphate fertilizer. Second, apply flower and boll fertilizer early and heavily. Generally in late early July, when 1~2 large bolls appear on the lower part of the cotton plant, carry out topdressing, applying 15~20 kg of urea per mu. Third, supplement with topping fertilizer.
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Key Technical Points for Intercropping Pinellia ternata in Woodland
Pinellia ternata, also known as three-leaf pinellia or ground-plant pinellia, is a perennial herbaceous plant with persistent roots in the Araceae family. Its tubers are used as medicine and have the functions of drying dampness and resolving phlegm, and descending adverse qi to stop vomiting. It is shade-tolerant, cold-tolerant, and afraid of sunlight; the seedlings fear heat, so it is suitable for intercropping with trees. 1 Propagation techniques Pinellia ternata is generally propagated by underground corms and bulbils, and can also be propagated by seeds. 1.1 Corm propagation When harvesting corms around Cold Dew, select the smaller ones for seed, bury them in moist soil in a cool, ventilated place, and around Qingming of the second year, transplant them into the field at a row spacing of 10 cm x 6 cm. Transplanting depth
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Cultivation Methods and Key Technical Points for Pizhou Pinellia
I. Growth Characteristics Pinellia prefers warm, humid, semi-shaded, semi-sunny environments and is suitable for planting in loose, fertile sandy soil with a pH of 5.6--6.4. Pinellia is sensitive to heat and cold; the suitable growing temperature is 15--25°C. Above 26°C it begins summer dormancy and seedling collapse, and below 13°C it overwinters and the seedlings wither. Pinellia emerges 3 times per year: the first from late March to early April, the second in early to mid-June, and the third in early to mid-September. The initial sprouting of bulbils begins in early April, peaks in mid-April, and the maturation period is from late April to early May. Each growth period lasts 50--60 days. Pinellia propagation includes tuber propagation, bulbil propagation, and seed propagation, but seed propagation has a low germination rate and a longer growth period. Tuber propagation uses the small tubers remaining after sorting commercial Pinellia as seed; its advantage is a relatively short growth cycle, generally planted in spring and harvestable by late summer of the same year. Bulbil propagation uses bulbils as seed; they are abundant in number, germinate reliably, and have an earlier maturation period, making it the main propagation method for developing Pinellia production.
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Control Methods and Technical Key Points for Pests and Diseases of Asarum (Wild Ginger)
The main disease is sclerotinia rot, which mainly damages the roots. In the early stage, the base of the root becomes soft and rotting, with white filamentous substances visible, and gradually the aboveground leaves turn yellow, then lodge and die. Spray the leaves or drench the roots with a 500 to 1000 times dilution of 50% carbendazim. The main pest is the black hairy caterpillar, which generally appears in mid to late June. It damages the leaves, and in severe cases the leaves are completely eaten bare. Spray with a 1000 times dilution of dichlorvos or trichlorfon to kill them.
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Methods and Technical Key Points for Pest and Disease Control in Asarum
For damping-off disease, before the seeds emerge in spring, spray the seedbed surface with 70% Dexon at 500 times dilution; after emergence, use 50% carbendazim at 500 times dilution for control. Sclerotinia disease mostly occurs in June-July. At the early stage of the disease, brown strip-shaped lesions appear at the base of the leaf petioles, and after they spread, the aboveground parts lodge and die. At the same time, the pathogen spreads to the roots, covering the rhizome with black sclerotia, until the entire root rots away leaving only the root bark. The control methods are: loosen the soil promptly in early spring, raise the soil temperature, and pay attention to drainage; promptly pull out and destroy diseased plants
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Detailed Explanation of the Key Technical Points for Bed-Frame Cultivation of Straw Mushroom
1 Cultivation Time The time for bed-frame cultivation of straw mushroom should be chosen in seasons when the daily average temperature reaches above 25°C. This is because the growth and development of straw mushroom require the room temperature of the mushroom house to be kept above 27°C, and sharp rises or drops in temperature must be strictly avoided to prevent the young mushroom buds from shriveling and dying. According to several years of trials, the sowing period in this county can generally be arranged from early May to early September (if the room temperature is slightly low in May, a gasoline drum can be used for heating). 2 Structure and Requirements of the Mushroom House Ordinary slate-roofed mushroom houses or general tile-roofed mushroom houses require internal sealing with plastic film or
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