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題目:新疆雜交棉育苗移栽稀植群體冠層結構特征及與產(chǎn)量關系的研究 摘要:在北疆氣候生態(tài)條件下,以雜交棉品種新陸早43號和魯棉研24號為材料,采用育苗移栽進行稀植,研究移栽稀植條件下冠層結構形成、光合特性及產(chǎn)量的變化。結果表明:當移栽密度在1.5-4.5萬株∙hm-2低密度條件下,單株結鈴數(shù)增加,單鈴重提高,但由于單位面積植株少,總鈴數(shù)有所下降,與采用常規(guī)的矮密早模式下的對照產(chǎn)量低;稀植條件下3萬株/hm2與4.5萬株/hm2產(chǎn)量相近,但用苗量少50%,皮棉產(chǎn)量可達到2900 kg∙hm-2高產(chǎn)水平;同時生育進程有所提前,霜前花率提高20%,因此,以實現(xiàn)穩(wěn)產(chǎn)為目標,在播種出苗期災害較多的北疆地區(qū)可以采用移栽稀植。 |
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The study of the relationship between the canopy structure and the production of transplanting Xinjiang hybrid cotton Abstract: The hybrid cotton varieties of Xinluzao 43 and Lumian 24 were studied in the northern climatic conditions. The canopy structure, photosynthetic characteristics and yield were studied with the transplanting cotton at low density via thin planting seedling transplanting. The results showed that: the number of bolls and its weight were increased when transplanting density was at 1.5-4.5 million/hm-2. But the total boll number was decreased for the fewer plants at per unit area and the production was lower compare to the conventional way. The production were similar at the density of 30,000 / hm2 and 45 000 / hm2 while the seedlings could save 50% for 30,000/hm2. Moreover, the production of lint could up to 2900 kg/hm-2. At the same time, the process of growth was become faster and the flowers before frost increased by 20%. Therefore, the sparse transplanting could be used in northern regions where has more disaster in order to achieve stable production. |
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