黑龙江西部半干旱区水氮耦合对薏苡生长的影响  

Effects of Different Nitrogen-Water Coupling on Coix Growth in Arid Regions of Western Heilongjiang

作　　者：黄玉兰[1] 张兴梅[1] 孙跃春[1] 王丽艳[1] 王北艳[1] 殷奎德[1] HUANG Yulan;ZHANG Xingmei;SUN Yuechun;WANG Liyan;WANG Beiyan;YIN Kuide(Faculty of Biological Life,Heilongjiang Bayi Agricultural University,Daqing 163319,China)

机构地区：[1]黑龙江八一农垦大学植物微生物互作实验室,黑龙江大庆163319

出　　处：《东北农业科学》2022年第4期15-19,共5页Journal of Northeast Agricultural Sciences

基　　金：国家青年科学基金项目(31701344);黑龙江省农垦总局项目(HNK125B-02-03)。

摘　　要：为探讨黑龙江西部半干旱区水氮耦合对薏苡生长及氮肥利用的影响,以薏辽5号为材料,采用随机区组设计,设4个施氮水平(N_(0)、N_(1)、N_(2)和N_(3))和4个灌水量(W_(1)、W_(2)、W_(3)和W_(4)),研究不同水氮组合对薏苡株高、茎粗、叶绿素(SPAD值)、氮肥利用率、千粒重及产量的影响。结果表明,单独的施氮量或灌水量对薏苡生长和氮肥利用率影响不大,一定范围内水氮耦合能表现出正交互作用,其中W_(2)N_(2)处理千粒重及产量与W_(0)N_(0)组相比分别提高14.92%和13.04%;氮肥回收利用率提高58.11%。在黑龙江西部地区膜下滴灌生产方式下,薏苡氮肥最佳施用量为150 kg/hm^(2),灌水定额为673.08 m^(3)/hm^(2)。To explore effects of different nitrogen-water treatments on growth and nitrogen utilization rate of dripirrigated coix in cold and arid regions of western Heilongjiang,the coix cultivar,Yiliao 5,was selected as the plant material.Using random group design and setting 4 nitrogen levels(N_(0),N_(1),N_(2),N_(3))and 4 irrigation quantities(W_(1),W_(2),W_(3),W_(4)),the effects of different nitrogen-water treatments on the height,stem diameter,SPAD value,nitrogen utiliza⁃tion rate,thousands of grains and yield of coix were studied.The results showed that the amount of nitrogen applica⁃tion or irrigation alone has little effect on the growth and the nitrogen fertilizer utilization rate of coix,and the cou⁃pling of water and nitrogen within a certain range can exhibit positive interaction.The spike weight thousands of grains and yield of coix of W_(2)N_(2)separately were enhanced 14.92%and 13.04%with W_(0)N_(0),the nitrogen recycle rate being enhanced 58.11%.Under drip irrigation coupled with film mulching,the optimal amount of irrigation for coix in western Heilongjiang was 673.08 m^(3)/ha and the nitrogen application was 150 kg/ha.

关 键 词：薏苡 水氮耦合 膜下滴灌 生长 氮肥利用率 

分 类 号：S519[农业科学—作物学]