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- W2373989372 abstract "A regression design(Table 1)was adopted with Yangmai 5, a wheat cultivar of spring habit, as the material in order to find an optimized combination of sowing date, sowing rate and nitrogen application to win wheat yields as high as 6000 kg per hm2 or more. The results are summarized as follows. ①Earlier sowing and less seedlings per hectare could increase the leaf number per main stem(Table 2).②The ear number per plant was increased with decreasing seedlings per hectare, especially when the seedling number was less than 1.5 million per hm(Fig. 1).③The filled grain number per ear was increased and the 1000-grain weight decreased with the increase in the ear number of per plant(Fig. 2). The decrease in 1000-grain weight could cause the decrease in the volume weight of grains(Fig. 3).④The wheat yield was increased with the increased amount of accumulated dry matter after anthesis(Fig.4, Table 3).⑤When the proportion of nitrogen fertilizer applied as basic fertilizer, tillering fertilizer and heading fertilizer was 5: 2: 3, the wheat yield was the highest(Table 4). Through frequency analysis,an optimized combination of cultural factors for a target yield Of more than 6000 kg/hm in average Climatic conditions was established, i. e., sowing date Oct. 12-15, seedling number 0. 75-0. 90 million/hm, total nitrogen application 300 -345 kg/hm(Table 5). In view of the difficulty in carrying out low sowing rate in practice, it would be better to set the per hm seedling number at about 1.2 million and the ear number per plant at 3-4, when the combination technology is applied to high yielding fields. If this technology is applied to common fields,it may be advisable to keep the seedling number per hm at about 1. 5 million and the average ear number per plant at 3, on the basis of an earlier sowing date and a reasonable increase in nitrogen application." @default.
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- W2373989372 date "1994-01-01" @default.
- W2373989372 modified "2023-09-25" @default.
- W2373989372 title "A Study on the Combination of Main Cultural Factors for High Yielding of Wheat" @default.
- W2373989372 hasPublicationYear "1994" @default.
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