学术
摘 要:
采用田间试验，研究了混料试验中的单形重心设计在西瓜控释尿素与普通尿素配肥上的应用，测定了西瓜的生长状况和产量结构，进行了西瓜品质、土壤养分的分析，总结出了西瓜施用控释尿素的氮素利用率。结果表明，控释尿素配合施用可降低结瓜节位，增加地茎粗度、蔓长，显著提高单瓜重，单施可增加西瓜的叶片敷；控释尿素可提高西瓜的安全品质和营养品质。控释尿素土壤有机质的提高不明显，对全氮、碱解氮有显著提高，并具有明显的后效。U—D60-D90配合施用可显著提高氮素利用率，比普通尿素相对高98．58％，1360-D90比普通尿素相对高85．09％，U—D90比普通尿素相对高6217％，在西瓜生产中可选用U—D60-D90、D60-D90两种方案施肥，既可提高西瓜产量又可提高品质。[著者文摘]
文章出处:
《干旱地区农业研究》-2007年25卷5期 -20-24页
栏目信息:
文献标识码:
A
文章编号:
1000-7601（2007）05-0020-05
Effects of using release-controlled urea prescription ratio on the growth, quality and fertilizer power of watermelon
WANG Xin （Department of Life Sciences, Longdong University, Qingyang , Gansu 745000, China）
Abstract:
Through field experiment, we studied the application of the mixture experiment of the simplex centroid design of release-controlled urea and normal urea of watermelon, checked the growth situation and yield structure of watermelon and analyzed the field nutrient and the quality of watermelon, then we summarized the utilization of coated urea and nitrogen on watermelon. The results showed that： the method of using coated urea would lower the position producing fruits, enlarge the thickness of aerial stem, turnip length, leaf number and improve the single fruit weight obviously. This method would improve the safety and nutrient quality of watermelon. It＇ s not very obvious for the coated urea to improve the OM of the field, but the total nitrogen and alkaloid N of field improve a lot, and plays a long-time utility on field. The method of using U - D60 - D90 would improve the utilization ratio of the field, which is 98.58% higher than normal urea, D60 - D90 would be 85.09% higher and U - D90 62.17% higher than normal one. So, we can choose two methods： U- D60 - D90 and D60 - D90 in the yield of watermelon, both would improve the production and quality of the watermelon.[著者文摘]
Key words:
watermelon; release-controlled urea ; simplex centroid design; quality; soil nutrient; utilization ratio of nitrogen
基金资助:
甘肃省庆阳市科技攻关计划项目（GDK031-1-5）;陇东学院科学研究项目（Szzk0312）
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