氮磷钾肥施用量对桑树生长发育及干物质积累的影响

Effects of Nitrogen,Phosphorus and Potassium Application on Growth and Dry Matter Accumulation in Mulberry

本研究采用"3414"田间试验方案,研究不同施肥处理对夏伐式修剪、多年生试验桑园桑树主要生长发育指标及干物质积累量的影响。结果表明,适量的氮磷钾肥能促进桑树正常生长发育,提高干物质含量,增加干物质积累量。氮肥、磷肥、钾肥对单株产叶量的影响表现分别为N2>N3>N1>N0、P2>P1>P3>P0、K2>K1>K3>K0。桑叶干物质积累量推荐施肥量为694.36kg/hm2N、198.15 kg/hm2P、274.26 kg/hm2K,最大值为8045.04 kg/hm2;枝条干物质积累量推荐施肥量为1000.05 kg/hm2N、242.04 kg/hm2P、218.01 kg/hm2K,最大值为5969.05 kg/hm2;春季新稍干物质积累量的推荐施肥量为883.76 kg/hm2N、204.48 kg/hm2P、426.59 kg/hm2K,最大值1410.24 kg/hm2。本文可为四川丘陵蚕区优质桑园建设提供参考。

In this paper, the effect of different fertilizer treatment on the main indexes of growth and development and dry matter accumulation of summer cutting pruning and perennial mulberry were studied with ‘3414＇ field experiment design. The results showed that right amount of N, P, K could promote mulberry growth and development, improve its dry matter content, and increase its dry matte accumulation. The effects of N, P, K on leave yield per plant were expressed as N2 〉 N3 〉 N1 〉 NO, P2 〉 P1 〉 P3 〉 P0, K2 〉 K1 〉 K3 〉 K0, respectively and the maximum dry matter accumulation and recommended fertilizer amount of mulberry leave, mulberry branch and mulberry shoot were re- spectively 8045.04 kg/hm^2and 694.36 kg/hm^2N, 198.15 kg/hm^2P, 274.26 kg/hm^2K; 5969.05 kg/hm^2 and 1000.05 kg/hm^2N, 242. 04 kg/hm^2P, 218.01 kg/hm^2K, 1410.24 kg,/hm^2and 883.76 kg/hm^2N,204.48 kg/hm^2p,426.59 kg/hm^2K. This conclusion would pro- vide reference for the construction of high quality mulberry field in Sichuan hilly area.