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Copyright of Chinese Journal of Oil Crop Sciences is the property of Oil Crops Research Institute of Chinese Academy of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Oil Crop Sciences is the property of Oil Crops Research Institute of Chinese Academy of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

【Objective】In order to establish the reasonable planting density under the double-row planting model of large ridges and build a high-yielding peanut group model, the impact of the double-row planting density of large ridges (90 cm) on the characteristics, group structure changes and yield of peanut plants was studied.【Method】The semi-trailing type peanut variety 'Silihong' and the erect type 'Jihua26'were used as experimental materials. Set 6 planting densities: M1 (31.71×104 plants/hm2), M2 (27.75×104 plants/hm2), M3 (24.67×104 plants/hm2), M4 (22.20×104 plants/hm2), M5 (18.50×104 plants/hm2), M6 (15.85×104 plants/hm2), based on single ridge (60 cm) double-seed sowing (11.93×104 holes/hm2) as a comparison (CK). Determine the seedling rate, plant growth, SPAD value, dry matter accumulation and yield of each peanut variety under different density, and establish a reasonable group structure of peanuts and the optimal planting density of different varieties.【Result】The emergence time of different varieties was different under different planting densities, the emergence time of 'Silihong' was earlier than 'Jihua 26'. 25 days after sowing, the seedling rate of 'Silihong' was up to 100% at M3 density, 30 days after sowing, the seedling rate of 'Jihua26' was up to 100% at M3 density, which were significantly higher than other densities. With the decrease of planting density, the height of the main stem and the length of the side branch gradually increase with the decrease of the number of plants per unit area; the SPAD value tends to increase first and then decrease with the decrease of planting density; 'Jihua 26' with the decrease of density, the quality of dry matter showed a tendency to rise first and then decrease, and 'Silihong' the accumulated amount showed a trend of gradually increasing. With the reduction of planting density, the number of pods per plant, pod yield per plant and weight of 100-pod increased first and then decreased of the two experimental varieties, the highest value was under M4 density of 'Jihua26' and M5 density of 'Silihong', which were significantly higher than other densities. The yield of the two experimental varieties continues to increase, Jihua 26 at M4 density had highest yield was 7 956.67 kg/hm2 and 'Silihong' at M5 density had highest yield was 4 790.73 kg/hm2, compare to control increase 96.14% and 65.42% respectively.【Conclusion】Compared with the single-row double-seed planting mode, the large ridge double-row + single-seed planting mode can increase the peanut height, SPAD and dry matter accumulation. At the same time, the yield is improved. Under the condition that the density remains unchanged, peanuts can be changed from double-seed to single-seed precision sowing, which increases the yield. When planting in two rows of large ridges, the appropriate sowing density should be selected according to the type of peanut varieties. The M5 density of the semi-trailing type peanut varieties is the best, and the M4 density of the erect type peanut is the best.

【Objective】 In order to establish the reasonable planting density under the double-row planting model of large ridges and build a high-yielding peanut group model, the impact of the double-row planting density of large ridges (90 cm) on the characteristics, group structure changes and yield of peanut plants was studied.【Method】 The semi-trailing type peanut variety ‘Silihong’ and the erect type ‘Jihua26’were used as experimental materials. Set 6 planting densities: M1 (31.71×104 plants/hm² ), M2 (27.75×104 plants/hm² ), M3 (24.67×104 plants/hm² ), M4 (22.20×104 plants/hm² ), M5 (18.50×104 plants/hm² ), M6 (15.85×104 plants/hm² ), based on single ridge (60 cm) double-seed sowing (11.93×104 holes/hm² ) as a comparison (CK). Determine the seedling rate, plant growth, SPAD value, dry matter accumulation and yield of each peanut variety under different density, and establish a reasonable group structure of peanuts and the optimal planting density of different varieties.【Result】 The emergence time of different varieties was different under different planting densities, the emergence time of ‘Silihong’ was earlier than ‘Jihua 26’. 25 days after sowing, the seedling rate of ‘Silihong’ was up to 100% at M3 density, 30 days after sowing, the seedling rate of ‘Jihua26’ was up to 100% at M3 density, which were significantly higher than other densities. With the decrease of planting density, the height of the main stem and the length of the side branch gradually increase with the decrease of the number of plants per unit area; the SPAD value tends to increase first and then decrease with the decrease of planting density; ‘Jihua 26’ with the decrease of density, the quality of dry matter showed a tendency to rise first and then decrease, and ‘Silihong’ the accumulated amount showed a trend of gradually increasing. With the reduction of planting density, the number of pods per plant, pod yield per plant and weight of 100-pod increased first and then decreased of the two experimental varieties, the highest value was under M4 density of ‘Jihua26’ and M5 density of ‘Silihong’, which were significantly higher than other densities. The yield of the two experimental varieties continues to increase, Jihua 26 at M4 density had highest yield was 7 956.67 kg/hm² and ‘Silihong’ at M5 density had highest yield was 4 790.73 kg/hm², compare to control increase 96.14% and 65.42% respectively. 【Conclusion】 Compared with the singlerow double-seed planting mode, the large ridge double-row + single-seed planting mode can increase the peanut height, SPAD and dry matter accumulation. At the same time, the yield is improved. Under the condition that the density remains unchanged, peanuts can be changed from double-seed to single-seed precision sowing, which increases the yield. When planting in two rows of large ridges, the appropriate sowing density should be selected according to the type of peanut varieties. The M5 density of the semi-trailing type peanut varieties is the best, and the M4 density of the erect type peanut is the best [ABSTRACT FROM AUTHOR]

In order to explore the suitable planting mode and single-seed precision sowing density of peanut, Quanhua No. 22 was selected as the experimental material> and the split-plot design was adopted. The two planting methods of bare land and film mulching were the main treatments, and the five densities of single-seed sowing were the secondary treatments. The difference of plant growth and pod yield under two planting patterns with d辻ferent seeding densities was compared with the double-seed conventional seeding density as comparison. The results showed that compared with the planting treatment of bare land, the planting treatment of film mulching could shorten the growth period and increase the yield, and the yield difference between them was extremely significan匚 The yields of peanut under the treatment of single-seed sowing density with the planting spacing of 17 cmX 17 cm were all the highest in the secondary treatments of the two main treatments. The yield was 3 308. 85 kg • hm-2 under the treatment of bare land, which was 13. 30% higher than that of the control group, and the difference was significant. The yield was 3 737. 63 kg • hm-2 under the treatment of film mulching, which was & 34% higher than that of the control group, and the difference was extremely significan匚 The peanut variety Quanhua No. 22 selected in the experiment was planted with the treatment of single-seed sowing and film mulching with the planting spacing of 17 cmX 17 cm, which had good potential for increasing the yield and efficiency. [ABSTRACT FROM AUTHOR]

The effects of single-seed sowing and double-seed sowing on the yield and characters of peanut under the climatic conditions in Fujian were studied to provide theoretical basis for the variety selection and the cultivation techniques of single-seed sowing. The six varieties of pearl type of peanut were selected from the southern ecological zone to carry out the comparative experiment of single-seed sowing and double-seed sowing, thus to study the effects of the single-seed sowing and double-seed sowing on their yield and characters. And the change rules of other 20 characters related to the economic characters were analyzed by using the grey relational grade analysis. The results showed that the single-seed sowing could significantly increase the plant type index, the number of branches, the number of fruiting branches, total number of pods, pod yield per plant and seed kernel yield per plant (P<0. 01), the full pod rate was significantly decreased (P<0. 01), and the height of main stem was sign辻icantly decreased (P

Copyright of Chinese Journal of Oil Crop Sciences is the property of Oil Crops Research Institute of Chinese Academy of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Single-seed sowing is a new, simple and efficient cultivation mode for peanut that realized from cultivation of healthy individual and construction of high-yielding population. The cultivation mode has the obvious advantages in uniform seedling, strong sprouting, seed saving and cost saving, thus it is considered as one of the effective ways for high-yield and high-efficient peanut cultivation in China in the future. Through integrating with other high-efficiency and simple cultivation measures, the single-seed sowing technology system has made conforming to Chinas national standardization cultivations of peanut and the technology was already applied in the main producing areas of peanut and gained the significant efficiency and abroad application prospects. Based on many years of researches in single-seed sowing technology, high-efficiency fertilization and scientific chemical control in the research team, by combining with the latest research results in plant protection and machinery, this paper described the key points and matters needing attentions from variety selection, planting mode, rational fertilization, planting specifications and field management. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)