effects of rice straw covering net on soil erosion and wheat yield were studied with self-designed soil erosion boxes under simulated rainfall.
通过自制土壤沖蚀槽,并进行人工模拟降雨试验,研究了稻秆编织地表覆盖物对坡地土壤侵蚀和小麦产量的影响。
the methods to utilize the liquid-preserved acetic acid bacteria during yielding vinegar were established, and the main factors affecting its acid yield were studied in this paper.
试验确定了液体保藏醋酸菌的应用方法,并对影响其产酸水平的因素进行了初步研究。
effects of waterlogging at filling stage on n, p, k nutrition metabolism and yield were studied applying simulation waterlogging method.
采用盆栽模拟渍水逆境试验方法,研究了花后渍水逆境对不同耐渍性小麦品种产量及n、p、k营养状况的影响。
effects of natural factors and livestock capacity on forage yield were studied in native grassland over 5 counties of hainan prefecture, qinghai province, china.
以天然草地为研究对象,对海南州5个县天然草地的牧草产量与主要自然因素、载畜量的影响进行了研究分析。
the synthesis method of quinalphos by the process of compound phase transfer catalyst (ptc)and the factors affecting synthesis yield were studied in this paper .
报导了采用复合相转移催化剂合成喹硫磷,并研究了各种因素对合成收率的影响。
abstr: the effects of biochar on maize dry matter accumulation, distribution and maize yield were studied by a plot field experiment.
文章摘要: 采用大田试验方法,研究玉米秸秆炭对玉米干物质积累、分配及产量形成特性的影响。