Seed filling dynamic traits of oil flax in response to nitrogen and phosphorus  

作　　者：Yaping Xie Bin Wang Limin Wang Junyi Niu Wei Zhao Bin Yan Li Zhao Zhao Dang Wenjuan Li Yanni Qi Jianping Zhang 

机构地区：[1]Crop Research Institute,Gansu Academy of Agricultural Sciences,Lanzhou,China. [2]College of Agronomy,Gansu Agricultural University,Lanzhou,China.

出　　处：《Oil Crop Science》2019年第3期152-165,共14页中国油料作物学报(英文版）

基　　金：supported by the National Natural Science Foundation of China (31660368, 31560347 and 31360315);the Technology Innovation of Oil Crops Breeding and Innovation Team of New Cultivars Breeding (2017GAAS22);the Science and Technology Plan Project of Gansu Province (17ZD2NA016-3);the China Agriculture Research System of Construct Special (CARS-17-GW04, CARS-17-GW-09)

摘　　要：Crop yield is primarily seed-filling-limited in production system under field conditions.This study was aimed to determine whether seed filling traits of oil flax(Linum usitatissimum L.)could be controlled by phosphorus(P),nitrogen(N),and phosphorus and nitrogen(NP)supply.Effects on seed filling traits were investigated in 2 years including capsule diameter,capsule height,capsule dry matter(DM),seed DM per capsule,pericarp DM per capsule,protein content and oil content.DM translocation from pericarps to seed,translocation efficiency,and contribution of photoassimilates during seed filling period were also detected.In a randomized complete block design,cultivar'Longyaza 1'was grown under P(33 kg P/ha),N(75 kg N/ha),and NP(33 kg P/ha and 75 kg N/ha)along with a zerofertilizer(CK)treatment in 2013 and 2014.Results suggested that DM translocation efficiency and contribution efficiency increased to different extent due to P,N or NP application.At 42 DAA(days after anthesis),seed DM per capsule reached the greatest,while protein content and pericarp DM obtained the least level.However,the highest oil content was detected at 35 DAA.A significant positive linear relationship was observed between seed DM,capsule DM and DM translocation in both years.Protein content showed inconsistent relation with oil content.The results indicated that appropriate N and P management could be an effective approach to increase oil flax production.Crop yield is primarily seed-filling-limited in production system under field conditions. This study was aimed to determine whether seed filling traits of oil flax(Linum usitatissimum L.) could be controlled by phosphorus(P), nitrogen(N), and phosphorus and nitrogen(NP) supply. Effects on seed filling traits were investigated in 2 years including capsule diameter, capsule height, capsule dry matter(DM), seed DM per capsule, pericarp DM per capsule, protein content and oil content. DM translocation from pericarps to seed,translocation efficiency, and contribution of photoassimilates during seed filling period were also detected. In a randomized complete block design, cultivar ’Longyaza 1’ was grown under P(33 kg P/ha), N(75 kg N/ha), and NP(33 kg P/ha and 75 kg N/ha) along with a zerofertilizer(CK) treatment in 2013 and 2014. Results suggested that DM translocation efficiency and contribution efficiency increased to different extent due to P, N or NP application. At 42 DAA(days after anthesis), seed DM per capsule reached the greatest,while protein content and pericarp DM obtained the least level. However, the highest oil content was detected at 35 DAA. A significant positive linear relationship was observed between seed DM, capsule DM and DM translocation in both years. Protein content showed inconsistent relation with oil content. The results indicated that appropriate N and P management could be an effective approach to increase oil flax production.

关 键 词：OIL FLAX nitrogen phosphorus seed filling dry matter TRANSLOCATION EFFICIENCY contribution EFFICIENCY protein CONTENT OIL CONTENT 

分 类 号：F42[经济管理—产业经济]