摘要
对河套地区低肥力盐碱地进行苜蓿水肥管理田间试验,研究在定量氮磷和氮磷钾施肥下,不同灌水量和不同灌水次数对第2年生紫花苜蓿产量和品质的影响。结果表明:在施用N3P3的条件下,灌水量在90 m^3/667m^2时总产量最高为22 857 kg/hm^2;在施用N3P3K3的条件下,灌水量在50 m^3/667m^2时总产量最高为23 598 kg/hm^2。在施用N3P3二元素肥料下,灌溉可以提高紫花苜蓿的粗蛋白、粗脂肪的含量,但是随着灌水量的增加,苜蓿粗蛋白、粗脂肪的含量差异不显著;苜蓿在灌水3次(70 m3/667m^2)的处理下品质最好。在施有N3P3K3三元素肥料下,灌水70 m3/667m^2时,3茬苜蓿的品质均优于其他处理;灌水3次,第1茬第3茬苜蓿的品质最好;灌水2次,第2茬苜蓿的品质最好。总体来看,苜蓿在不同施肥条件下,采取相应的灌水处理才能更好地提高苜蓿的产量和品质。
The field experiment of alfalfa water and fertilizer management in low fertility saline-alkali soil area was conducted. The effects of different irrigation amount and different irrigation times on the yield and quality of the second year alfalfa were studied with quantitative N, P and K fertilization. The results showed that total yield was up to 22 857 kg/hm^2 with irrigation amount of 90 m3/ 667m2 under the condition of applying N3P3 and 23 598 kg / hm^2 with irrigation amount of 50 m3/667m2 under the condition of applying N3P3K3. The content of crude protein and crude fat of alfalfa increased with the increasing of irrigation amount, but had no significantly difference. Alfalfa irrigation three times( 70 m3/ 667m2) had the best quality. The quality of three stubble alfalfa treatments was better than other treatments under the condition of applying N3P3K3 fertilizers and the quality of alfalfa was the best for the first and third stubble when irrigation 3 times(70 m3/667m2). The second stubble alfalfa had the best quality when irrigation times were twice. Overall,appropriately irrigation can improve the yield and quality of alfalfa during different fertilization conditions.
出处
《北方农业学报》
2017年第1期42-47,共6页
Journal of Northern Agriculture
基金
国家科技支撑计划资助项目(2013BAC02B06)
关键词
紫花苜蓿
灌水量
灌水次数
产量
品质
Alfalfa
Irrigation quantity
Irrigation frequency
Yield
Quality
