水肥对高产无性系油茶果实产量的影响

以肥料氮(N)、磷(P)、钾(K)不同施用量和灌溉水量(H2O)为试验因子,采用二次通用旋转组合设计,研究了水肥对油茶鲜果产量的影响。结果表明,N、P、K和H2O的用量对油茶鲜果产量均存在显著的影响,且N与K、K与H2O对油茶鲜果产量存在显著的互作效应。试验因子间的交互作用使油茶鲜果产量明显提高,达到最大值时4个因子的编码值分别为:N为1.03、P为0.62、K为1.19、H2O为0.92,即全年每株油茶施有效养分N 181.8 g、P2O5 48.6 g、K2O 287.1 g,灌水29.2 kg,相当于每hm2施用N 795 kg、P2O5 80 kg、K2O 474 kg,灌水48 m3。采用该方案,油茶鲜果产量可达到最大为5 131 kg hm2。

Effects of water and fertilizer on fruit yield of high-yielding clonal Camellia oleifera abel

A field experiment, adopting the quadratic general rotary combination design with nitrogen (N), phosphorus (P), potassium (K) and irrigation water as test factors, was carried out to explore effects of water and fertilizer on fruit yield of Camellia oleifera Abel. Results show that the effects of the amount of N, P and K used and of H2O irrigated on fresh fruit yield were significant, and besides, apparent synergy of the test factors on fruit yield was observed. Interactions between the factors significantly increased fruit yield of C. oleifera Abel, and when the yield reached maximum, the coding value of the four factors, N, P, K and H2O, was 1.03, 0.62, 1.19 and 0.92, respectively. That is to say, if each plant receives available nutrients 181.8 g N, 48.6 g P2O5 and 287.1 g K2O and 29.2 kg water annually, or the C. oleifera Abel field is applied with 795 kg N, 80 kg P2O5 and 474 kg K2O, and irrigated with 48 m3 water per hectare, fresh fruit yield of C. oleifera Abel can reach as high as 5 131 kg/ha.