论文部分内容阅读
通过１９９１～１９９３年的研究，确定了吨粮田小麦品种以宁春１３号、宁春１４号、宁春１６号、宁春１７号和宁春４号为主，配套玉米品种为掖单１３号、掖单１２号、宁单７号；形成了小麦、玉米占地比例６０：４０或６５：３５，玉米以种植３行为主的种植模式；建立了小麦亩播种粒数、玉米密度、玉米施氮、玉米施磷的综合农艺措施多元数学函数模型和小麦亩播有效种子３７．４～３９．９万粒、收获穗数３５万左右玉米设计密度４８００～５０００株／亩、亩收获穗数４２００～４５００万、单穗粒重１５０～１６０ｇ的群体结构，以及玉米亩施纯氮２４．０～２５．９ｋｇ、纯磷４．６～４．７ｋｇ的施肥技术。吨粮田促控的矛盾主要是玉米，玉米合理的促控指标为：６月２０～２５日玉米株高与小麦齐平。叶面积指数抽雄期达到２．９４～３．９５，籽粒灌浆期达到最大，保持在３．５６～４．６４。总光合势为１６．９６～２１．７２米２·日。干物质积累在玉米灌浆结束时应达到１３４５～１５８３ｋｇ／亩。
Through the research from 1991 to 1993, it was confirmed that the main wheat varieties of ton grain fields were Ningchun 13, Ningchun 14, Ningchun 16, Ningchun 17 and Ningchun 4, and the maize varieties were Yedan 13 Yedan No. 12 and Ningban No. 7. A wheat-corn planting area of 60:40 or 65:35 was formed. The main planting pattern was 3-line planting of maize. The number of sown grains per acre, corn density, Nitrogen and maize phosphorus synthetic agronomy Multivariate mathematical function model and acres of seed sowing effective seeds 37.4 to 39.9 million, harvesting spike number of maize around 350,000 design density of 4800 ~ 5000 plants / mu, harvesting spikes 4200-4500000, 150-160g of grain weight per spike and 24.0-25.9kg pure nitrogen of Mushu and 4.6-4.7 kg of pure phosphorus. The contradiction between the promotion and control of grain fields is mainly that of corn. The reasonable index for promoting and controlling corn is as follows: June 20-25, the corn plant height is flush with that of wheat. The leaf area index reached 2.94 ~ 3.95 at the tasseling stage, and the grain filling stage reached the maximum, maintaining at 3.56 ~ 4.64. Total photosynthetic potential of 16.96 ~ 21.72 m 2 · day. Dry matter accumulation should reach 1345 ~ 1583kg / mu at the end of grain filling.