-
Introduction to the Root Characteristics and Structure of Soybean
The root system of soybean is a taproot system. It is divided into a main root and lateral roots, and both the main root and the lateral roots are densely covered with root hairs. The main part of the root lies 5-20 cm deep in the soil, and the whole root system is roughly bell-shaped. On soybean roots, rhizobia live in symbiosis with the soybean. When the soybean germinates, the rhizobia invade the root, and when the soybean grows its first compound leaf, root nodules have formed on the soybean roots, first on the main root and then gradually spreading to the lateral roots. The root nodules are produced through the action of rod-shaped rhizobia that have 1-2 flagella at one end. They are aerobic bacteria, mainly growing on the root system near the soil surface
-
Why soybean root cutting and pinching can increase yield
1. High-yield cultivation method for soybean by root cutting and pinching: Direct sow soybeans with a row spacing of 50 cm. On the 8th to 9th day after sowing, carry out pinching; on the 10th to 11th day, carry out root cutting. When cutting roots, use a thin iron shovel to cut the main root at a depth of about 5 cm below the soybean seedling. Insert the shovel at an angle and pull it out from the same position to avoid displacing the soybean seedling and damaging the lateral roots. The root cutting position should be controlled at about 2.5 cm below the soybean seedling stem. Too deep or too shallow will fail to achieve the expected purpose and may even cause seedling death. 2. Several issues to note 1. Density: Soybean density should be determined according to the variety and cultivation conditions,
-
What are the effective control methods for the soybean root miner fly
The soybean root miner fly Ophiomyia shibatsuji (kato), also known as the bean root snake miner fly, belongs to the order Diptera, family Agromyzidae. It is commonly called the soybean root maggot, bean root snake fly, root miner fly, etc. I. Distribution and damage. The soybean root miner fly is mainly distributed in the main soybean producing areas; in China it is found in the three northeastern provinces, Inner Mongolia, Hebei, Shandong and Shanxi, among which Heilongjiang, Jilin and Inner Mongolia are the most prominent. The soybean root miner fly mainly causes damage during the soybean seedling stage; its feeding habit is monophagous, attacking only soybean and wild soybean. The larvae bore into the soybean
-
How to control soybean root maggots? All the control methods are here
Soybean root maggot, also called soybean root miner fly. It only harms soybean and wild soybean. The larvae bite and feed on the roots of soybean seedlings, forming maggot tunnels and excreting frass, causing root rot and stunted soybean plants; severely affected seedlings wither and die. This pest has only one generation per year. It overwinters as pupae in root bark tumors of soybean or in soil cracks; in mid-to-late May of the following year, it emerges as adults, lays eggs at the soybean roots, and hatches larvae that damage the soybean seedling roots. Control method: use seed dressing with chemicals to prevent larvae; dress seeds with 40% dimethoate emulsifiable concentrate at 0.7% of the seed weight, mix with water and spray, stirring while spraying. If dressing
-
Comprehensive control methods for soybean root-knot nematode disease
Soybean root-knot nematode disease, also known as "Fire Dragon Seedling," is a whole-plant disease caused by nematodes attacking soybean roots, leading to bacterial infection and disease. Affected plants grow slowly, with short, small, and yellowing stems and leaves, delayed flowering, few and small pods, and shriveled seeds; in severe cases, no pods form, or even the entire plant dies. Soybean root-knot nematode disease spreads rapidly, and the pathogenic nematodes can survive in the soil for a long time. Once the disease occurs, it is very difficult to eradicate completely, so comprehensive control measures must be adopted: 1. Select and sow disease-resistant varieties; 2. Control the source of infection
-
Symptoms, Identification, and Control Methods of Pinellia ternata Root Rot
It mostly occurs in hot and humid seasons; the underground tubers rot, and the above-ground parts turn yellow, wilt, fall over, and die. Control methods: (1) Pay attention to drainage after rain. (2) In the early stage of the disease, drench the planting holes with 5% lime milk. (3) Control underground pests.
-
What are the control methods for the soybean root miner fly?
The soybean root miner fly belongs to the order Diptera, family Agromyzidae. Also known as the soybean root maggot, soybean root miner fly, etc., this insect is a monophagous pest that only damages soybean and wild soybean. It is distributed in Heilongjiang, Liaoning, Inner Mongolia, Shandong and Hebei, among other places. Damaged plants can suffer yield losses of more than 40% per plant compared with healthy plants. 1. Morphological characteristics (1) The adult is about 3 mm long, glossy black, with wings that are light purple with a metallic sheen. The compound eyes are bright red. (2) The egg is about 0.015 mm long and about 0.04 mm wide, kidney-shaped, white and translucent.
-
What measures promote rice root development?
1. Sow early at the right time. When the temperature stabilizes at 5°C, begin sowing and raising seedlings; do not raise seedlings for the May crop. When the temperature stabilizes at 13°C, begin transplanting; do not transplant for the June crop. Transplant during the high-yield period to gain accumulated temperature, which is beneficial to root development. 2. Prepare the land carefully and create the conditions. Do a good job of plowing and rotary tilling; generally the plowing depth is 20 cm and the rotary tilling depth is 14 cm. Keep the plowing or rotary tilling depth uniform, so that the mud is not exposed even in water an inch deep, creating the conditions for root development. 3. Strengthen management and promote development. First, seedling-field management: control the temperature well, water reasonably, spray fertilizer on the leaves, and prevent
-
Cultivation Techniques and Field Management Methods for Digupi (Chinese Wolfberry Root Bark)
Cultivation Techniques for Digupi
-
Glutinous Rice Root
[Aliases] Nuogan Tou, Nuogen Xu. [Source] The dried roots with short residual stems of glutinous rice (Oryza sativa Linn.), a plant of the genus Oryza in the grass family. [Original Plant] Glutinous rice is an annual tufted herb, up to 1 m tall; culms erect, hairless. Leaf blades flat, linear-lanceolate, slightly rough, 30-60 cm long, 6-10 mm wide; ligule membranous, long and conspicuous. Panicle loose, 15-30 cm long; branches numerous, long and ascending; spikelets oblong, 6-
条件筛选