Study on Effects of Planting Pattern on Development，Yield and Lint Quality of Cotton

棉花学报 Cotton Science 2007，19(6):440-445

Study on Effects of Planting Pattern on Development，Yield and Lint Quality of Cotton
XUE Xiao-ping^1，2，CHEN Bing-lin¹，ZHOU Zhi-guo^1*，WANG You-hua¹，YANG Bao-ping¹
(1.Key Laboratory of Crop Growth Regulation of the Ministry of Agriculture，Hi-Tech Key Laboratory of Information Agriculture，Jiangsu Province，Nanjing Agricultural University，Nanjing 210095，China;2.Shandong Province Climate Centure，Jinan 250031，China)

Abstract:In order to study the effects of planting pattern (“Seedling nursing with nutrient bowl +transplant”model，T0;“Seedling nursing with nutrient bowl +transplant +mulch with plastic”model，T1;“ Factory-cultivated seedlings + transplant without earth + mulch with plastic”model，T2)，two field experiments were conducted in Dongtai and Sheyang in Jiangsu province，respectively. The result showed that，with the development of growth stage，the pattern of dry matter accumulation and nitrogen uptake per area could be expressed as T2>T1>T0. The effects of planting pattern on dry matter and accumulation of nitrogen in root; nutrient organs and reproductive organs of cotton were also significants respectively. Among three planting patterns，the accumulation amounts of biomass and nitrogen with cropping pattern of T2 were the highest，which the nitrogen using efficiency was the highest，too. Due to the stress by plants of wheat in the seedling stage of cotton in Sheyang，the dry matter and nitrogen accumulation were lower than those of corresponding values in Dongtai.
 It was shown that the effects of planting pattern on lint percentage，yield，and number of boll per area were significantly. But the effects on boll number per plant and weight of boll was comparatively lower. The number of boll per area and lint yield with cropping pattern of T2 were 36% and 26% higher in Dongtai，and 32% and 28% higher in Sheyang than the corresponding curves with planting pattern of T0，respectively. This result indicated that field managements of cotton should be focused on regulation and control of the lint percentage and boll number per area of cotton in practical field managements.
 By comparing the effects of planting pattern on the fiber quality such as strength，length，micronaire，uniformity，and elongation in two experimental sites，an extremely significant level was obtained，and fiber strength and micronaire were impacted more severely than other fiber properties. Fiber strength，micronaire，uniformity，and elongation with the planting pattern of T2 were the best，but fiber length with the management of T0 was more better than that with other two treatments. The fiber qualities of 1to12 branching position turned out to be better than that of the upper position. Therefore，in order to obtain superior fiber，branch of cotton should be controlled not more than 12.The result of two experiments shown that the coast with planting pattern of T2 was the lowest，the yield was the highest and fiber quality was better than that with other planting patterns.
Key words:planting pattern; cotton; yield; quality [Full Text, 2892KB]