Effects of different growth stage application combinations of amendments on secondary salinized soil properties and sweet corn yield in Hexi Corridor
[Objective]To study the effects of different application combinations of Hexi Corridor saline-alkali soil improv on secondary saline-alkali soil improvement and sweet corn growth in Hexi Corridor,so as to determine the best application plan of improver.[Methods]Taking Tianyu 2 as the test crop,the effects of saline-alkali soil improv on seedling emergence rate,seedling preservation rate,plant height,stem diame-ter,plant fresh weight,yield composition,yield,economic benefit and soil saline-alkali index of sweet corn in the whole maize growth period were studied.[Results]The seedling emergence rate increased by 8.38％-11.00％when saline soil amendment was applied once with seeding water,and the seedling preservation rate increased by 13.31％-15.64％when saline soil amendment was applied twice with seeding water.The bald tip length of the third amendment was shortened by 44.30％,the rate of the first grade was up to 46.27％,and the yield and economic benefit were the best.Saline-alkali soil amendments applied in different periods can reduce soil saline-alkali indices,pH,EC and ESP by 0.15-0.35,31-146 μs/cm and 0.8％-4.8％,respectively.[Conclusion]In summary,the best application time scheme of Hokang saline-alkali soil improver for soil improvement is:sowing time+improver 37.5 kg/hm2,seedling stage+improver 30 kg/hm2,spinning stage+improver 15 kg/hm2.
growth periodsecondary salinizationpolymaleic acidsweet come
万方数据
维普
