Effects of Drip Irrigation Amounts with Water and Fertilizer on Growth,Dry Matter Accumulation and Operation of Spring Maize
In order to explore the suitable irrigation amount for maize planting under the condition of integrated drip irrigation and water fertilizer in Ningxia,this study conducted a study on the effects of irrigation amount on spring maize growth,dry matter accumulation,transport and yield in 2019 and 2020.Taking Dika517 as the test variety,us-ing the method of field experiment,three irrigation water levels were set up:CK(100％,3,300 m3/ha),T1(70％,2,310 m3/ha),T2(85％,2,805 m3/ha).In 2019,plant height,stem diameter and SPAD values were the highest under T1,the next is T2,and the lowest is CK.In 2019 and 2020,the leaf area index(LAI)of spring maize under T1 was larger,which was beneficial to the maintenance of chlorophyll.In 2019 and 2020,the total dry matter accumulation in-creased gradually with the advance of the growth period,and the dry matter transport efficiency was the highest un-der T2.Among the yield components,grain weight per ear and weight of 100 grains are closely related to yield.Grain length per ear,bald tip length,grain weight per ear and weight of 100 grains in 2020 are all important factors affect-ing yield.In both two years,the grain yield under T1 was 5.17％,32.07％and 3.52％,26.88％higher than that under T2 and CK,respectively.For this test area,70％drip irrigation can be recommended as the reference index of the lo-cal drip irrigation water and fertilizer integrated irrigation amount.
Drip irrigation,water and fertilizer integrationSpring maizeIrrigation amountDry matterYield
NETL
NSTL
万方数据
