摘要
以常规(单秆)移栽棉为对照,研究双秆棉产量品质优势及其形成机理。两年试验结果表明:在大田生长期缩减40天左右的情况下,双秆棉子棉产量2002年较CK增加12.72%,2004年较CKI和CKII分别增加17.04%、20.99%,均达显著水平;2004年双秆棉优质铃率较CKI和CKII分别高出21.46、2.75个百分点,据灰色系统关联度分析法评价,双秆棉总体纤维品质优于CKI和CKII,具有显著的产量品质优势,突出表现为开花结铃盛期与最佳光热季节同步期内的成铃的聚载效应和成铃的时空效应。双秆棉在最佳光热季节成铃强度达3.65万个·(hm2·d)1的同步期为24天,同步期间成铃强度比对照高1万个·(hm2·d)1左右,伏桃、早秋桃较对照多25.63万～36.00万个·(hm2·d)1,中下部内围铃较对照多17万个·hm2以上。
To achieve high yield, quality cotton and better benefit with amass boll-setting in Jianghuai valley cotton district, China, study on yields and fiber quality of double-stem cotton and boll-setting mechanism were implemented in Nanjing, regarding double-stem cotton as treatment and single-stem cotton as check. The experiment results of two years indicated：the farm-growing period was reduced about 40 days, the seed cotton yield of double-stem cotton was 12.72% higher than CK in 2002, and was 17.04% ,20.99% higher than CKⅠ , CKⅡ in 2004, both on remarkable lever. The percentage of high-quality boll of double-stem cotton in 2004 was 21.46,2.75 higher than CKⅠ ,CKⅡ. Grey correlative degree analysis to the fiber quality of double-stem cotton and CK Ⅰ ,CK Ⅱ ,the result manifested that the overall fibre quality of double-stem cotton is superior to the other two treatments. The double-stem cotton has remarkable superiority on cotton yield and fiber quality to the single-stem cotton, it was prominently showed on the amass boll-setting effect in the best solar radiation and heat season and the boll-setting spatiotemporal effect. During the amass boll-setting in step with the best solar-heat season, the intensity of boll-setting of cotton amount to 3.65 × 10^4 per hecter per day, it was over 1.0 × 10^4 per hecter per day than CK. The quanty of the boll in summer and early-autumn was 25.63 × 10^4-36.00 × 10^4 per hecter much than CK, and the quanty of the boll near the main stem in middlebottom place was 17.0×10^4 much than CK.
出处
《棉花学报》
CSCD
北大核心
2006年第1期47-52,共6页
Cotton Science
基金
江苏省十五科技攻关资助项目(BE2001335)
关键词
双秆棉
产量构成
纤维品质
聚载效应
成铃时空效应
double-stem cotton
yield components
fiber quality
amass boll-setting effect
spatiotemporal effect of boll setting
