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以夏谷区主栽品种冀谷31为材料,通过测定微集水种植和露地栽培(对照)的农艺性状、经济性状、干物重、光合速率、叶面积系数、土壤水分含量、土壤温度和叶绿素含量,探讨武安市半干旱区微集水种植的增产机理,为该技术在半干旱夏谷区的推广应用提供科学依据。结果表明:微集水种植较对照增产16.28%,土壤水分含量在10~20 cm深度提高10%以上,膜内土壤温度最高升高2.4℃,净光合速率提高15.44%,叶面积指数提高11.5%,SPAD值提高10.07%。因此,微集水种植具有显著增产的作用,其生理机制在于:微集水种植起到了保墒升温作用,促进了植株的生长发育;提高了净光合速率和叶面积指数,促进了根茎叶穗的干物质积累;在此基础上单穗重、穗粒重、出谷率、亩穗数经济性状得到提高;后期提高了功能叶片的叶绿素含量,防止了早衰,减少了秕谷。因此将微集水种植作为半干旱地区谷子生产的主要方式之一具有科学依据,应积极进行推广。
In this study, agronomic traits, economic traits, dry matter weight, photosynthetic rate, leaf area index, soil water content, soil temperature and chlorophyll Content of micro-Catchment planting in semi-arid area of Wu’an City to provide a scientific basis for the popularization and application of this technology in semi-arid Summer Valley area. The results showed that the micro-catchment water yield increased by 16.28% compared with the control, the soil water content increased by 10% at the depth of 10-20 cm, the maximum soil temperature increased by 2.4 ℃, the net photosynthetic rate increased by 15.44% and the leaf area index increased by 11.5% , SPAD value increased by 10.07%. Therefore, the micro-catchment planting has a significant yield-increasing effect. Its physiological mechanism is that micro-catchment planting has played a role of increasing the temperature and increasing the temperature, promoting the growth and development of the plant, increasing the net photosynthetic rate and leaf area index, Dry matter accumulation. On the basis of this, the economic traits such as single spike weight, grain weight per spike, grain yield per valley, and ear acreage increased, chlorophyll content of functional leaves increased at the later stage, preventing premature aging and reducing stolon. Therefore, micro-catchment planting as a semi-arid area of millet production has one of the main scientific basis, should be actively promoted.