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本试验旨在探讨有机肥配合化肥的三种施肥水平(三要素比例为1∶0.5∶1),对盛果期碰柑(Citrus reticulata Blanco)的效应。比较试验表明:不同处理对植株生长、结果及营养状况有明显差异。增施肥料对干周、叶片、新梢的生长量有良好效应,尤其能显著增加对产量有密切关系的春梢生长量。适当提高施肥水平可增加产量,高肥及中肥分别比低肥增产30.7％及14.5％,且果实品质有所改善。组织测定及叶片分析证明,不同施肥水平与叶片养分含量有相关性:5—6月,春梢叶片水溶性养分含量随施肥量增加而增加;9月,叶片氮、磷全量与产量呈显著负相关,而叶片钾全量与产量相关不显著。初步认为,闽南红壤丘陵地桠柑保持亩产5,000斤水平,可参考以下施肥量(亩):N 50—60斤,P_2O_5 25—30斤,K_2O 50—60斤。
The purpose of this experiment was to investigate the effects of three fertilizers (three elements ratio of 1: 0.5: 1) on fertilizers Citrus reticulata Blanco. Comparative experiments show that: different treatments on plant growth, the results and nutritional status have significant differences. Fertilizer application had a good effect on the growth of dry weeks, leaves and shoots, especially significantly increased the amount of spring shoots that had a close relationship with yield. Properly increasing the fertilization level can increase the yield, and the high and medium fertilizers increase the yield by 30.7% and 14.5% respectively compared with the low fertilizers, and the quality of the fruits is improved. Tissue determination and leaf analysis showed that different fertilization levels were correlated with leaf nutrient content. From May to June, the water-soluble nutrient content of spring leaf increased with the increase of fertilizer application. In September, the total nitrogen and phosphorus content and yield of leaf were significantly negative Related to the total potassium content and yield were not significant. It is preliminarily believed that the population of Kumquat in the red soil hilly area of Fujian Minmetals maintains a yield of 5,000 kg per mu, which can be referred to the following amount of fertilizer (Nm): 50-60 kg N, 25-30 kg P_2O_5 and 50-60 kg K_2O.