[Effects of bundled straw mulching on water consumption characteristics and grain yield of winter wheat in rain-fed semiarid region].

To explore a new technique of planting wheat with high yield and efficiency by mulching technology in rain-fed semiarid regions in Northwest China, a two-year fixed-site trail was conducted during 2013-2015. There were five mulching modes: (1) three sowing rows by bundled straw mul-ching with alternating 30-cm-wide mulching belt and planting belt (SM), (2) four sowing rows by bundled straw mulching with alternating 40-cm-wide mulching belt and planting belt with (SM), (3) five sowing rows by bundled straw mulching with alternating 50-cm-wide mulching belt and planting belt (SM), (4) whole plastic film mulching with dibbling (PMF), (5) bare field planting without any mulching (CK). We examined the effects of different mulching modes on water consumption, water use efficiency (WUE), and yield of winter wheat in rain-fed region in Northwest China.

[Effect of straw belt-mulching on soil temperature and yield of winter wheat in rain-fed semiarid region.].

To evaluate the effects of straw belt-covering on soil temperature and yield of winter wheat in rain-fed semiarid region in Northwest China, five mulching modes, including flat field planting without any mulching (CK), whole plastic film mulching (PM), straw mulching by 30 cm covering belt with an interval of 30 cm planting belt with three-row sowing (SM), straw mulching by 40 cm covering belt with an interval of 40 cm planting belt with four-row sowing (SM), and straw mulching by 50 cm covering belt with an interval of 50 cm planting belt with five-row sowing (SM), were set by two-year fixed-site trails in 2013-2015. The results showed that soil temperature significantly varied among different growth stages and soil layers in all treatments. SM, SM and SM significantly decreased soil temperature by 1.