Heavy pods make the soybean plant type, especially the leaf area, change, and thus affect the yield formation. Production should be avoided as much as possible. If it is important to pay attention, it is necessary to pay attention to the selection of varieties in order to reduce the reduction in production caused by heavy weighting. Under the double-grass conditions, the plant height, seedling height, and leaf area index of Liaodou 13 and Tiefeng 30 and Tiefeng 29 have a smaller change than other varieties. These three varieties may be the conditions under heavy-headed conditions in Liaoning Province. Tolerance to high-yield varieties, research on the effect of heavy-stemmed conditions on soybean plant type, and discussion on the characteristics of plant type of resistant to heavy-soybean varieties, provide reference for selection and breeding of resistant to heavy-soybean varieties.
The experiment was conducted in experimental field of experimental farm of Shenyang Agricultural University in 2004. The design of the split zone is adopted, and the main treatment is the gargle: the sorghum (the former sorghum is the sorghum) and the heavy sorghum; the vice treatment is the cultivar. The planting density was 150,000 plants/hm2 and 3 replicates. Each plot had 5 rows, a row length of 5m and a row spacing of 0.6m. The trial materials were selected from 10 main soybean varieties in Liaoning: Kai 8157, Liaodou 11, Liaodou 13, Liaodou 14, Liaodou 15, Tiefeng 27, Tiefeng 29, Tiefeng 30, Tiefeng 31 and Shennong 8 Content and methods of measurement After soybean emergence, samples were taken every 21 days to determine the dynamic changes of the plants. The leaf area index was determined using a laser leaf area meter. The photosynthetic rate of different varieties was measured at the soybean grain stage, and the photosynthetic rate was measured with a photosynthetic apparatus. At the time of maturity, 10 plants of representative plants were continuously selected for the test.
The plant height of soybean cultivars under heavy pods had a tendency to decrease as compared with that of the normal pods, but the difference was not significant (P=0.4924>0.05), and the change of plant height was related to the habit of scarring, and the height of subtropical plants was limited. There is a general trend of reduction, and the plant height of the limited knot habits is the opposite, but the differences are not significant. There was no significant change in the number of branching pods compared with Zheng 茬 (P=0.1243>0.05). Only Liaodou 15 and Shennong 8 were reduced. There was an increasing trend in the number of heavy stems of the main stem compared with the positive ones, especially those with limited nodal habits, but the difference was not significant (P=0.0631>0.05). Heavy pods increased the scab height of soybean significantly (P=0.0043<0.01), and the variation range of different cultivars was different. Liaodou No. 15 increased the most, Tiefeng No. 31 and Liaodou No. 11 took the second place, Tiefeng No. 30 changed little, and Liaodou No. 13 and Liaodou No. 14 had almost no change.
The results of dynamic measurement of leaf area index showed that the leaf area index of heavy-soybeans was lower than that of normal-soybean, and the difference was mainly in the middle and late stages of soybean reproduction. The reduction in the leaf area index is related to the habit of scarring, the reduction of sub-limitation soybeans is greater, and the limited soybean yield is relatively small. It can be further seen that the leaf area index of Liaodou 14 and Tiefeng 31, which have limited habits of subcontractivity, has a greater decline, while the decline of Liaodou 13 is relatively small, and it has limited fertility. No.10 and Tiefeng No.30 also showed a small decrease in the leaf area index. The size of the leaf area index indicates the amount of green area where photosynthetic activity is carried out, directly affecting the production and production of dry matter. According to the results of photosynthetic rate, it can be seen that the photosynthetic rate re-sorghum has a tendency to decrease more than that of the normal alfalfa (except flowering stage), but the difference is not significant, and the photosynthetic rate of different varieties has different changes. The photosynthetic rate of Kai 8157, Liaodou 14 and Liaodou 13 decreased significantly, while that of Tiefeng 27 and Tiefeng 30 did not decrease.
The effects of heavy pods on plant height, number of branches, and number of main stem segments were not significant compared with those of normal pods, and heavy pods could significantly increase the height of soybean pods. Heavy pods reduced the leaf area index of soybeans, and the decrease in leaf area index was related to the habit of pods. The reduction of sub-limit pod soybeans was greater, and the limited pod soybeans were relatively small. The chlorophyll content of soybeans with heavy pods was reduced, and the seedling and grain-filling periods were significantly decreased. The photosynthetic rate enthalpies also decreased compared with those of pods. The effect of heavy wolfberry on the soybean plant type is related to the pod habits, it has a greater influence on the sub-limit pod soybeans, and the impact on the limited pod soybeans is relatively small.
The experiment was conducted in experimental field of experimental farm of Shenyang Agricultural University in 2004. The design of the split zone is adopted, and the main treatment is the gargle: the sorghum (the former sorghum is the sorghum) and the heavy sorghum; the vice treatment is the cultivar. The planting density was 150,000 plants/hm2 and 3 replicates. Each plot had 5 rows, a row length of 5m and a row spacing of 0.6m. The trial materials were selected from 10 main soybean varieties in Liaoning: Kai 8157, Liaodou 11, Liaodou 13, Liaodou 14, Liaodou 15, Tiefeng 27, Tiefeng 29, Tiefeng 30, Tiefeng 31 and Shennong 8 Content and methods of measurement After soybean emergence, samples were taken every 21 days to determine the dynamic changes of the plants. The leaf area index was determined using a laser leaf area meter. The photosynthetic rate of different varieties was measured at the soybean grain stage, and the photosynthetic rate was measured with a photosynthetic apparatus. At the time of maturity, 10 plants of representative plants were continuously selected for the test.
The plant height of soybean cultivars under heavy pods had a tendency to decrease as compared with that of the normal pods, but the difference was not significant (P=0.4924>0.05), and the change of plant height was related to the habit of scarring, and the height of subtropical plants was limited. There is a general trend of reduction, and the plant height of the limited knot habits is the opposite, but the differences are not significant. There was no significant change in the number of branching pods compared with Zheng 茬 (P=0.1243>0.05). Only Liaodou 15 and Shennong 8 were reduced. There was an increasing trend in the number of heavy stems of the main stem compared with the positive ones, especially those with limited nodal habits, but the difference was not significant (P=0.0631>0.05). Heavy pods increased the scab height of soybean significantly (P=0.0043<0.01), and the variation range of different cultivars was different. Liaodou No. 15 increased the most, Tiefeng No. 31 and Liaodou No. 11 took the second place, Tiefeng No. 30 changed little, and Liaodou No. 13 and Liaodou No. 14 had almost no change.
The results of dynamic measurement of leaf area index showed that the leaf area index of heavy-soybeans was lower than that of normal-soybean, and the difference was mainly in the middle and late stages of soybean reproduction. The reduction in the leaf area index is related to the habit of scarring, the reduction of sub-limitation soybeans is greater, and the limited soybean yield is relatively small. It can be further seen that the leaf area index of Liaodou 14 and Tiefeng 31, which have limited habits of subcontractivity, has a greater decline, while the decline of Liaodou 13 is relatively small, and it has limited fertility. No.10 and Tiefeng No.30 also showed a small decrease in the leaf area index. The size of the leaf area index indicates the amount of green area where photosynthetic activity is carried out, directly affecting the production and production of dry matter. According to the results of photosynthetic rate, it can be seen that the photosynthetic rate re-sorghum has a tendency to decrease more than that of the normal alfalfa (except flowering stage), but the difference is not significant, and the photosynthetic rate of different varieties has different changes. The photosynthetic rate of Kai 8157, Liaodou 14 and Liaodou 13 decreased significantly, while that of Tiefeng 27 and Tiefeng 30 did not decrease.
The effects of heavy pods on plant height, number of branches, and number of main stem segments were not significant compared with those of normal pods, and heavy pods could significantly increase the height of soybean pods. Heavy pods reduced the leaf area index of soybeans, and the decrease in leaf area index was related to the habit of pods. The reduction of sub-limit pod soybeans was greater, and the limited pod soybeans were relatively small. The chlorophyll content of soybeans with heavy pods was reduced, and the seedling and grain-filling periods were significantly decreased. The photosynthetic rate enthalpies also decreased compared with those of pods. The effect of heavy wolfberry on the soybean plant type is related to the pod habits, it has a greater influence on the sub-limit pod soybeans, and the impact on the limited pod soybeans is relatively small.
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