不同耕作方式对西北地区春玉米土壤物理性状及产量的影响
通过对土壤容重、土壤紧实度、土壤田间持水量、土壤含水量及玉米产量的测定和分析,探究春季深松、条带深旋耕、常规表层旋耕3种耕作方式,对西北地区春玉米土壤物理性状及玉米产量的影响。结果表明,春季深松、春季条带旋耕在各生育时期对15～25cm、25～35cm土壤容重降低效果显著,春季深松和春季条带旋耕均显著的降低了15～25cm土壤紧实度,且显著提高了15～25cm、25～35cm土壤田间持水量,通过提高穗长、穗粒数和千粒重,春季深松较常规旋耕提高了经济产量。
英文摘要:
Through the measurement and analysis of soil bulk density,soil compaction,soil field water holding capacity, soil water content and corn yield, the effects of three tillage methods, namely deep pine cultivation, deep belt rotation tillage and conventional surface rotation tillage, on soil physical properties and maize yield of spring maize in northwest China were investigated. The results showed that in the spring, the deep pine and spring strip rotation had significant effects on the soil bulk density of 15-25 cm and 25-35 cm in each growth period. The spring deep pine and spring strip rotation significantly reduced the soil compaction of 15-25 cm,and significantly increased soil water holding capacity of 15 ~ 25cm, 25 ~ 35cm.By increasing the length of spikes, the number of grains per panicle and 1000-grain weight, spring deep pine increased economic yield compared with conventional rotary tillage.
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