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利用盆栽试验研究两种不同配比的控释复合肥CRFA(4%树脂包膜,N∶P2O5∶K2O为14∶14∶14)和CRFB(4%树脂包膜,N∶P2O5∶K2O为20∶8∶10)及普通复合肥CCF(N∶P2O5∶K2O为15∶15∶15)对杭白菊营养吸收和生长效应的影响.结果表明:普通复合肥CCF1(每盆6g氮素用量的CCF)和CCF2(每盆3g氮素用量的CCF)施入土壤后30d,土壤中碱解氮、有效磷、有效钾含量分别为163.29和145.26mg·kg-1、180.39和163.13mg·kg-1、300.08和213.15mg·kg-1,而后迅速下降.控释复合肥养分释放较慢,其土壤碱解氮含量在施肥后缓慢升高,在施肥后60d达到高峰,此时CRFA1(每盆6g氮素用量的CRFA)、CRFB1(每盆6g氮素用量的CRFB)、CRFA2(每盆3g氮素用量的CRFA)、CRFB2(每盆3g氮素用量的CRFB)分别为129.51、138.65、118.36、126.31mg·kg-1;CRFA1和CRFA2处理土壤有效磷含量与CCF处理变化趋势基本一致,施肥后30d分别达到169.54和133.46mg·kg-1,CRFB1和CRFB2处理在施肥后60d左右达到释放高峰,含量分别为137.13和84.68mg.kg-1,然后缓慢下降.两种不同养分配比的控释复合肥处理植株叶面积、叶面积系数、分枝数、开花率、每株花数、鲜花直径等农艺性状均明显优于等氮素用量的普通复合肥处理,其中CRFB控释效果优于CRFA,其更符合杭白菊对养分的需求,且在本试验条件下,CRFB2处理产量最高.
Pot experiments were conducted to study the effects of two different ratios of CRFA (4% resin coating, N:P2O5:K2O 14:14:14) and CRFB (4% resin coating, N:P2O5:K2O 20 : 8:10) and CCF (15:15:15 N:P2O5:K2O) on the nutrient absorption and growth of Chrysanthemum morifolium.The results showed that CCF1 (CCF of 6g nitrogen per pot) ) And CCF2 (CCF of 3g nitrogen per pot) were applied to the soil 30 days later. The contents of available nitrogen, available phosphorus and available potassium in the soil were 163.29 and 145.26 mg · kg -1,180.39 and 163.13 mg · kg -1, respectively , 300.08 and 213.15 mg · kg-1, respectively, and then decreased rapidly.The nutrient release of controlled-release compound fertilizer was slow, and the content of soil alkali-hydrolyzable nitrogen slowly increased after fertilization, reaching the peak at 60 days after fertilization, at which time CRFA1 CRFB1 (CRFB with 6g nitrogen per pot), CRFA2 (CRFA with 3g nitrogen per pot), CRFB2 (CRFB with 3g nitrogen per pot) were 129.51, 138.65, 118.36, 126.31mg · kg-1. The trend of available phosphorus in soil treated with CRFA1 and CRFA2 was basically the same as that of CCF, and reached 169.54 and 133.46mg · kg-1 at 30 days after fertilization, respectively. After treatment with CRFB1 and CRFB2, d reached the peak of release, the contents were 137.13 and 84.68mg.kg-1, respectively, and then decreased slowly.The leaf area, leaf area index, branch number and flowering rate of two kinds of controlled-release compound fertilizers were The flower number and the diameter of flowers were obviously better than the common compound fertilizer with the same amount of nitrogen. The control effect of CRFB was better than that of CRFA, which was more in line with the demand of nutrient of Chrysanthemum morifolium. Under the experimental conditions, CRFB2 Deal with the highest yield.