摘要
以四川丘陵蚕区桑园夏伐式养成的春秋两季桑树为研究对象,按不同施用量及配比施入氮(N)、磷(P)、钾(K)肥,调查桑树叶片、枝条、新梢等不同部位的N、P、K 3种养分的含量、吸收量及分配比例,为桑树合理施肥提供科学依据。从肥料种类来看,桑树不同部位的养分含量及养分吸收量均为N>K>P;从养分分配来看,桑树各部位在春、秋季和全年的养分分配均为叶片>枝条,其中春季为叶片>新梢>枝条。桑园按照不同施用量及配比施入N、P、K肥对桑树各部位的N、P、K含量和吸收量及其分配比率有明显影响:N(X1)、P(X2)、K(X3)施肥处理2水平(X12=600 kg/hm2,X22=210 kg/hm2,X32=300kg/hm2)、处理3水平(X13=900 kg/hm2,X23=315 kg/hm2,X33=450 kg/hm2)的桑树各部位养分含量和吸收量大多显著高于处理1水平(X11=300 kg/hm2,X21=105 kg/hm2,X31=150 kg/hm2)、0水平(不施肥)。研究结果表明,桑园合理增施N、P、K肥有利于提高桑树各部位N、P、K的含量和吸收量,推荐按照处理2水平施入N、P、K肥。
In this paper, summer-pruned mulberry tree planted in hilly areas of Sichuan Province in spring and autumn were selected as research subjects for fertilization experiment on application amount and proportion of N. P and K fertiliz- ers. The content, absorption amount and allocation proportion of N, P and K in leaf, branch and new shoot of mulberry tree were determined so as to provide scientific basis for rational fertilization in mulberry garden. Judging from the type of fertilizer, the content and absorption amount of nutrient in various portions of mulberry tree were all in the order of N 〉 K 〉 P. Based on the distribution of nutrients, the nutrients in different mulberry portions were all in the order of leaf 〉 branch in spring, autumn and whole year and in the order of leaf 〉 new shoot 〉 branch in spring, Application of N, P, K fertilizerswith different fertilization levels and different proportions had obvious impact on the contents of N, P, K, and absorption amount and allocation proportion of nutrients in different mulberry portions. In N （X1）, P （X2） and K （ X3） treatment groups, the content and absorption of nu- trients in various portions of mulberry tree from fertilization I^vel 2 （X12 =600 kg/hm^2, X22 =210 kg/hm^2, and X32 =300 kg/hm^2） and level 3 （X13 =900 kg/hm^2, X23 =315 kg/hm^2, and X33 =450 kg/hm^2） were significantly higher than that of level 1 （Xl 1 =300 kg/hm^2,X21 = 105 kg/hm^2, and Xa 1 = 150 kg/hm^2 ） and level 0 （ no fertilization）. The results showed that N, P and K rational fertilization in mulberry field would facilitate the improvement of N, P and K contents and absorption in different mulberry portions. It is recommended to apply N, P and K fertilizers in accordance with fertilization level 2 of this study.
出处
《蚕业科学》
CAS
CSCD
北大核心
2012年第5期930-937,共8页
ACTA SERICOLOGICA SINICA
基金
四川省农业科学院优秀论文基金项目(No.2011LWJJ-008)
四川省财政基因工程青年基金专项(No.2011QNJJ-021)
现代农业产业技术体系专项(No.CARS-22)
关键词
桑树
氮磷钾肥
施用量
养分吸收
养分分配
Morus L.
N, P and K fertilizer
Quantity of fertilization
Nutrient absorption
Nutrient distribution
