Abstract:
【Objective】 The field experiments were conducted to study the effects of bare land, plastic film mulching and different sowing dates on growth, nutrient uptake and yield of upland rice.
【Methods】 Two treatments of bare land and plastic mulch were set up, and the three sowing dates of each treatment were April 15 (early sowing), May 1 (suitable sowing), and May 15 (late sowing). The dry matter weight, nutrient absorption and yield of upland rice were analyzed by using upland rice varieties Haxiang 1 and Haxiang 2.
【Results】 The dry matter weight, nutrient uptake and yield in film mulched upland rice treatment were 14.7%-19.5%, 8.8%-54.2% and 18.4%-24.0% higher than those in bare land treatments respectively. The dry matter weight, nutrient uptake and yield in late sowing treatment were 17.5%-22.1%, 23.3%-55.0% and 71.7%-85.1% higher than those in early sowing treatments respectively. Under the plastic film mulching treatment, the dry matter weight, nutrient uptake and yield of suitable sowing treatment were the highest, which were increased by 9.0%-18.0%, 7.5%-30.3% and 3.6%-24.8% in early and late sowing respectively.
【Conclusion】 Under the conditions of plastic film mulching and suitable sowing, upland rice is the best cultivation mode for its growth, nutrient uptake and yield.