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What are the management measures for rice during the jointing and panicle elongation stage?
Currently, rice growth across the city has successively entered the jointing and panicle elongation stage, an important period of transition from vegetative growth to reproductive growth and a critical period that determines yield. Doing a good job of field management in the middle and late stages of rice is crucial for ensuring sufficient panicles, striving for large panicles, shaping a high-yield plant type, and building a good foundation for high yield. I. Seedling growth characteristics According to a survey on July 21, the average leaf age of machine-transplanted rice was 12.31 leaves, 0.49 leaves more than the same period last year; the average leaf age of direct-seeded rice was 10.31 leaves, 0.56 leaves more than the same period last year; the total number of stems and tillers was 38.63 for machine-transplanted rice
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Key Management Techniques for Rice at the Booting Stage in August
I. Field Management at the Booting Stage After good early vegetative growth, rice enters the reproductive growth stage of the middle and late periods. Strengthening water and fertilizer management at this stage is very important for high yields. Apply panicle fertilizer judiciously, depending on the field growth of the rice: for plots with too many stems per mu and dark green leaf color, do not apply; for plots with insufficient stems per mu and yellow leaf color, apply fertilizer, which can produce a clear yield increase. 1. Applying booting fertilizer: around August 5, for plots that did not receive early panicle fertilizer (mid-to-late July) and whose leaves have turned yellow at this time, apply 5-7 jin of urea per mu.
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Eight Measures for Safe Rice Seed Use Explained in Detail
1. Select varieties rationally. Rice blast is the main disease affecting harvest, and the resistance differences among varieties are very obvious; choosing varieties with strong resistance is one of the most effective preventive measures. In old rice blast areas and shaded cold-waterlogged fields, first, when purchasing seeds, carefully understand the resistance of the variety; second, new varieties should only be promoted after small-scale trial planting; third, use imported Fuji No. 1 for prevention at the early stage of disease onset and during the booting and heading stages. In mountainous areas with high humidity, for hybrid late rice it is not advisable to choose two-line hybrid late rice combinations, to prevent damage from rice false smut.
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Symptom Identification and Control Methods of Rice Dwarf Disease
The symptoms are mainly distributed in the southern rice-growing areas. Also known as rice common dwarf disease, common dwarf, green dwarf, etc. After rice is infected from the seedling stage to the tillering stage, the plant becomes dwarfed, tillering increases, leaves are dark green and stiff, and in the later growth stage the diseased rice cannot head or set grain. Diseased leaf symptoms manifest as two types. In the white-spot type, dashed-line-like yellowish-white dotted streak spots parallel to the leaf veins appear on the leaves or leaf sheaths, most obvious at the base. The new leaves above the first diseased leaf all show dotted streaks, while the older leaves below generally do not. In the twisted type, under insufficient light conditions, the heart leaf emerges twisted
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Introduction to the Characteristics of the Rice Variety K You 926
The hybrid rice K You 926 was developed in 1993 by the Rice and Sorghum Research Institute of the Sichuan Academy of Agricultural Sciences by crossing K17A (already identified) bred by the institute with Luhui 926. In 1995, it was jointly introduced to our city by the Chongqing Agricultural Technology Extension Station and the Chongqing Seed Station. In the three years 1996, 1998, and 1999, the average yield in the mid-season rice plus ratoon rice variety trials was 672.53 Kg per mu, a 3.36% increase over the control Shanyou 63. From 1995 to 1999, in 1
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Key Cultivation Techniques for Rice Variety II You 084
II You 084 is a new hybrid indica rice variety bred by the Zhenjiang Institute of Agricultural Sciences in Jiangsu. It shows high resistance to bacterial leaf blight and rice blast. It participated in the Jiangsu Province hybrid indica rice regional trial from 1999 to 2000, was exceptionally admitted to the Jiangsu Province production trial in 2000, and passed the approval of the Jiangsu Province Crop Variety Approval Committee in April 2001. It passed national approval in November 2003. On September 6, 2003, it set a new world record for rice yield per unit area at 1231.17 kg/mu. It is exclusively developed by Jiangsu Mingtian Seed Industry Technology Co., Ltd. Characteristics
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What causes rice seedlings to sit and bunch up?
After the transplanted rice was thrown and planted in the main spring season this year, many farmers came to me and said: "Their seedlings have been thrown and planted for more than ten days, why are they growing shorter and smaller the more they grow?" Our agricultural technology station investigated the seedling growth situation across the whole township, and finally found the causes of the seedlings growing shorter and smaller the more they grow, mainly: 1. Herbicides were used in a mixed and messy way, for example: after using the "Yelao" herbicide, the water flooded too deep, no new heart leaves grew, and some applied "Qiangxin" weeding fertilizer, etc., which inhibited rice growth and caused the seedlings to grow shorter and smaller the more they grow. 2. In muddy fields, rice lacks zinc,
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Key points of high-yield cultivation techniques for rice intercropping of hybrid rice and glutinous rice
Rice "hybrid-glutinous intercropping" refers to the intercropping cultivation of hybrid rice and glutinous rice. That is, medium-stalk hybrid rice and tall-stalk glutinous rice, using the advantage of the wide rows in the wide-narrow row strip planting of hybrid rice, and adding a single row of glutinous rice according to a certain belt width, row ratio and width. 1. Main advantages of hybrid-glutinous intercropping technology. 1. Increasing rice yield: Test results show that the combined total of the two crops under hybrid-glutinous intercropping increases yield by 28 kg per 667 sq m compared with ordinary hybrid rice, and by 110 kg compared with conventionally pure-planted glutinous rice. 2. Increasing income: Glutinous rice is
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Forecast for the occurrence trend of the first generation of the striped stem borer in rice is released
1. Occurrence level: The first generation of the striped stem borer, the main rice pest in our city, is expected to occur at a moderate-to-severe level, with the affected area in the city reaching more than 250,000 mu, of which more than 50,000 mu are early-planted idle fields. 2. Occurrence period: Moths seen under light on April 11, the beginning of the peak moth emergence period 5/9-12, the peak moth emergence period 5/20-24; the peak egg hatching period 5/27-5/30, the peak period of first and second instar larvae 6/4-6/10, the occurrence period is 3 days later than the average of the past three years. 3. Forecast basis 1. Development progress: This year 4/2
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Key Technical Points for High-Yield Cultivation of Intercropped Indica and Glutinous Rice
Rice "indica-glutinous intercropping" refers to a configuration method for cultivating hybrid indica rice and glutinous rice, that is, selecting medium-stem hybrid indica rice and tall-stem glutinous rice varieties, and using the wide rows within the wide-narrow row arrangement of hybrid indica rice to plant additional single rows of glutinous rice at a certain band width, row ratio and width, forming a composite of hybrid indica rice and glutinous rice within the same field. Based on the principles of three-dimensional agriculture, it uses the characteristics of different rice varieties, different maturity periods and different plant heights for intercropping cultivation, so that temperature and light resources are utilized at multiple levels,
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