Study on the Relationship between Leaf Area and Grain Weight Per Spike of Summer Grain by Living Leaf Area Meter
Plant leaves have a very important influence on their growth and production. The relationship between grain yield and wheat production has been studied. However, there are only a few studies on millet, and only the yield per unit area of ​​the spring valley population, the dry matter accumulation of plants, and the yield per unit area of ​​different densities have been studied. The relationship between blade and grain weight per spike in Xiagu still needs further study. The leaf area can be measured using a live leaf area meter.
The test materials are the high-generation hybrids of the Xiagu hybrids and the initial material. According to the plant type, they are divided into two types: lobular uprights and big leaves scattered. The number of materials was 53 leaflet uprights, and the largest leaf type was peopene, totaling 119. In the experimental plots, the soil was loam, the organic matter content was 2.82%, the total nitrogen content was 0.124%, the total phosphorus content was 0.155%, and the available nitrogen 95m was kg , Quick-acting PZ several 33.smg/kg, quick-acting K20182.5mg/kg, sowing on June 19th, seedlings on June 23th, seedlings on July 2nd, seedlings on July n, seedling density of 60000 plants/h Lining, cultivating, soil-cultivation 1 time, urea 1 time in booting stage, fertilizing amount 225k with h 澎, watering 2 times.Controlling borers, 1 each of armyworm.Sequentially arranged, 4 rows, 4m long, row spacing 0.35m, before mature, QD selected 10 representative strains in the middle two rows of each strain, and measured the leaf length and leaf width of the upper first, second and third leaves (from top to bottom). Single plants were harvested, sun dried, mixed threshing, and weighed.
The investigation of the 119 strains of the two plant types was carried out by the living leaf area meter. The leaf area of ​​leaves at different leaf positions was correlated with the grain weight per panicle, and the leaflets were erect and the leaf area of ​​the first leaf was significantly positively correlated with the grain weight per ear. There was a highly significant positive correlation between the area of ​​the top 2nd and 3rd leaves and the weight of spikes. There was a positive correlation between the leaf area of ​​the upper leaf and the weight of the spike, but not significant. The leaf area of ​​the upper leaf of the second and third leaf was significantly positively correlated with the grain weight of the ear. Xiagu is either a lobular upright type or a large leaf type, and the upper 2nd and 3rd leaves are functional leaves. These leaves have greater advantages in receiving sunlight and have a high photosynthetic rate, which is the key to improving grain yield.
Through the measurement of living leaf area meter, it was found that the size of the upper three leaves in the grain filling stage had a certain correlation with the grain yield per plant. The upper leaves of the second and third leaves were functional leaves, which had the greatest impact on grain yield. Lobular upright type, functional leaf area average 55.70c leaf lining, average grain weight per ear 9.619. Large-leafed type, functional leaf blade average leaf area 80.37. mZ, mean ear grain weight 10.769. The results showed that with large leaf area, the yield per plant was high, the leaf area was small, and the yield per plant was low. From the aspect of cultivation and management, the millet has less leaves in the early stage and has a small leaf area. The focus is on cultivating strong seedlings to ensure that the vegetative organs develop well. In the medium term, it is impossible to make the leaf area develop too much and seal it early to ensure that the stem is stout. In the later period, the upper leaves should be kept green, prevent early drying, extend the leaf age, enrich the grains, and increase the grain weight.
The test materials are the high-generation hybrids of the Xiagu hybrids and the initial material. According to the plant type, they are divided into two types: lobular uprights and big leaves scattered. The number of materials was 53 leaflet uprights, and the largest leaf type was peopene, totaling 119. In the experimental plots, the soil was loam, the organic matter content was 2.82%, the total nitrogen content was 0.124%, the total phosphorus content was 0.155%, and the available nitrogen 95m was kg , Quick-acting PZ several 33.smg/kg, quick-acting K20182.5mg/kg, sowing on June 19th, seedlings on June 23th, seedlings on July 2nd, seedlings on July n, seedling density of 60000 plants/h Lining, cultivating, soil-cultivation 1 time, urea 1 time in booting stage, fertilizing amount 225k with h 澎, watering 2 times.Controlling borers, 1 each of armyworm.Sequentially arranged, 4 rows, 4m long, row spacing 0.35m, before mature, QD selected 10 representative strains in the middle two rows of each strain, and measured the leaf length and leaf width of the upper first, second and third leaves (from top to bottom). Single plants were harvested, sun dried, mixed threshing, and weighed.
The investigation of the 119 strains of the two plant types was carried out by the living leaf area meter. The leaf area of ​​leaves at different leaf positions was correlated with the grain weight per panicle, and the leaflets were erect and the leaf area of ​​the first leaf was significantly positively correlated with the grain weight per ear. There was a highly significant positive correlation between the area of ​​the top 2nd and 3rd leaves and the weight of spikes. There was a positive correlation between the leaf area of ​​the upper leaf and the weight of the spike, but not significant. The leaf area of ​​the upper leaf of the second and third leaf was significantly positively correlated with the grain weight of the ear. Xiagu is either a lobular upright type or a large leaf type, and the upper 2nd and 3rd leaves are functional leaves. These leaves have greater advantages in receiving sunlight and have a high photosynthetic rate, which is the key to improving grain yield.
Through the measurement of living leaf area meter, it was found that the size of the upper three leaves in the grain filling stage had a certain correlation with the grain yield per plant. The upper leaves of the second and third leaves were functional leaves, which had the greatest impact on grain yield. Lobular upright type, functional leaf area average 55.70c leaf lining, average grain weight per ear 9.619. Large-leafed type, functional leaf blade average leaf area 80.37. mZ, mean ear grain weight 10.769. The results showed that with large leaf area, the yield per plant was high, the leaf area was small, and the yield per plant was low. From the aspect of cultivation and management, the millet has less leaves in the early stage and has a small leaf area. The focus is on cultivating strong seedlings to ensure that the vegetative organs develop well. In the medium term, it is impossible to make the leaf area develop too much and seal it early to ensure that the stem is stout. In the later period, the upper leaves should be kept green, prevent early drying, extend the leaf age, enrich the grains, and increase the grain weight.
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