简述水稻旱育稀植栽培技术要点

水稻旱育稀植技术是一项高产栽培综合配套技术,它具有省水、省工、省种、省秧田、节本、增产、增收等优点。它大大的提高了玉米的质量和产量,现将水稻旱育稀植技术要点总结如下:一、水稻旱育稀植技术高产原因一是旱育苗较湿润,育苗和直播的播种期分别提早10天和20天,从而延长了生育期,多争得200～400℃有效积温,这就从根本上克服了黑龙江省生育期短、积温少的劣势,又充分利用了黑龙江省昼夜温差大这一自然优势。     

胡家稻鸭“呱呱叫”

最近,四十多岁的江苏溧阳市埭头镇胡家村农民胡顺保,由于在20亩水稻田里放养了300只鸭子,实施"稻鸭共作",悄然间成了当地的"新闻人物"。胡顺保今年在20亩承包水稻田中,成功放养了300只鸭子。眼下鸭们个个生龙活虎般地健壮勤劳,水稻长势在此一方田野里出类拔萃,成为诱人眼球的"标杆方"。这稻鸭共作的生态种养     

桦甸市水稻田主要杂草及防除对策

对桦甸市水稻田常见杂草群落情况、发生规律进行了分析,提出了通过剔除草籽、机械秋翻、人工除草、生物防控、化学药剂防除水稻田常见杂草的技术措施,为桦甸市水稻田常见杂草的防除提供对策。     

阿苄合剂在抛秧稻田的除草效果

阿苄是由苄黄隆和阿罗津复配而成的新型稻田除草剂。我们对水稻的安全性及其对抛秧稻田杂草的防除技术进行了研究,旨在为大面积推广提供可靠依据。1材料与方法1．1供试药剂16％阿苄粉粒剂（镇江市植保站研制）,10％苄黄隆可湿粉（常州农药厂产）,30％阿罗津乳油（德国艾格福公司产）,25％、28％丁苄粉粒剂（镇江市植保站研制）。1．2对水稻的安全性规定1．2．1阿罗津对不同水稻品种秧苗素质的影响：于水稻秧苗3叶期,按亩用30％阿罗津50ml对水40kg均匀喷施。水稻品种或品系有9－92、9－108、武育粳3号、中粳315、武复粳4号、9380糯,每…     

佳木斯地区稻田应用生物链技术发展生态农业技术要点总结

前言:中国著名水产专家王武教授指出:水产与水稻结合是1+1=5的工程,即水产加上水稻等于粮食安全、食品安全、生态安全、农民增收、企业增效。水产+水稻就是在水稻田中放养可以与水稻共生的河蟹类、虾类、鱼类。水稻获得了增产——粮食安全;蟹     

南浦溪流域水稻田氮磷流失空间变化特征分析

以福建省南平市水稻主要生产地南浦溪流域为研究区,通过构建SWAT模型,模拟南浦溪流域2017～2019年水稻田氮磷流失情况,以分析该流域氮磷流失空间变化特征,确定南浦溪流域水稻田氮磷流失重点区域。结果表明：南浦溪流域水稻田年均总氮流失量为23.60kg·ha^-1,其中流域西北部的永兴镇、莲塘镇、临江镇以及西南部的水吉镇、小湖镇等地总氮流失最为严重;同时,该流域年均总磷流失量为3.07kg·ha^-1,流域南部的漳墩镇、水吉镇以及小湖镇等地总磷流失较为严重。因此,将上述总氮、总磷流失严重区域确定为南浦溪流域水稻田氮磷流失重点区域。     

稻鳝种养双丰收技术

用稻田养鳝是一种值得推广的饲养技术,稻田中有丰富的天然饲料,水稻又是很好的遮荫物,水田的深度也正好符合黄鳝的生长;黄鳝在田中钻洞松土, 捕食害虫,既有利于水稻生长, 又可减少水稻病虫害。利用水稻田种养相结合的具体做法如下: 1稻田耕整　每块养鳝稻田最好是1 334平方米以内,且水源充     

Automated Counting of Rice Planthoppers in Paddy Fields Based on Image Processing

A quantitative survey of rice planthoppers in paddy fields is important to assess the population density and make forecasting decisions. Manual rice planthopper survey methods in paddy fields are time-consuming, fatiguing and tedious. This paper describes a handheld device for easily capturing planthopper images on rice stems and an automatic method for counting rice planthoppers based on image processing. The handheld device consists of a digital camera with WiFi, a smartphone and an extrendable pole. The surveyor can use the smartphone to control the camera, which is fixed on the front of the pole by WiFi, and to photograph planthoppers on rice stems. For the counting of planthoppers on rice stems, we adopt three layers of detection that involve the following：（a） the first layer of detection is an AdaBoost classifier based on Haar features;（b） the second layer of detection is a support vector machine（SVM） classifier based on histogram of oriented gradient（HOG） features;（c） the third layer of detection is the threshold judgment of the three features. We use this method to detect and count whiteback planthoppers（Sogatella furcifera） on rice plant images and achieve an 85.2% detection rate and a 9.6% false detection rate. The method is easy, rapid and accurate for the assessment of the population density of rice planthoppers in paddy fields.     

Study of Dynamics of Floodwater Nitrogen and Regulation of Its Runoff Loss in Paddy Field-Based Two-Cropping Rice with Urea and Controlled Release Nitrogen Fertilizer Application

The article deals with the effects of urea and controlled release nitrogen fertilizer （CRNF） on dynamics of pH, electronic conductivity （EC）, total nitrogen （TN）, NH4^＋-N and NO3 -N in floodwater, and the regulation of runoff TN loss from paddy field-based two-cropping rice in Dongting Lake, China, and probes the best fertilization management for controlling N loss. Studies were conducted through modeling alluvial sandy loamy paddy soil （ASP） and purple calcareous clayey paddy soil （PCP） using lysimeter, following the sequence of the soil profiles identified by investigating soil profile. After application of urea in paddy field-based two-cropping rice, TN and NHa＋-N concentrations in floodwater reached peak on the 1st and the 3rd day, respectively, and then decreased rapidly over time; all the floodwater NO3--N concentrations were very low; the pH of floodwater gradually rose in case of early rice within 15 d （late rice within 3 d） after application of urea, and EC remained consistent with the dynamics of NH4^＋-N. The applied CRNF, especially 70% CRNF, led to significantly lower floodwater TN and NH4^＋ concentrations, pH, and EC values compared with urea within 15 d after application. The monitoring result for N loss due to natural rainfall runoff indicated that the amount of TN lost in runoff from paddy field- based two-cropping rice with urea application in Dongting Lake area was 7.47 kg ha^-1, which accounted for 2.49% of urea- N applied, and that with CRNF and 70% CRNF application decreased 24.5 and 27.2% compared with urea application, respectively. The two runoff events, which occurred within 20 d after application, contributed significantly to TN loss from paddy field. TN loss due to the two runoffs in urea, CRNF, and 70% CRNF treatments accounted for 72, 70, and 58% of the total TN loss due to runoff over the whole rice growth season, respectively. And the TN loss in these two CRNF treatments due to the first run-off event at the 10th day after application to early rice decreased 44.9 and 44.2% compared with urea, respectively. In conclusion, the 15-d period after application of urea was the critical time during which N loss occurred due to high floodwater N concentrations. But CRNF decreased N concentrations greatly in floodwater and runoff water during this period. As a result, it obviously reduced TN loss in runoff over the whole rice growth season.     

近年新昌县水稻田土壤主要理化指标变化及施肥建议

为指导水稻田科学施肥,对12个定位水稻田连续4年进行土壤采样检测与统计分析.结果表明,新昌县水稻田土壤酸性强度大,全氮、有机质比较丰富,有效磷时空差异较大,而土壤速效钾普遍缺乏,这就要求水稻种植户进一步改进水稻施肥结构,根据测土结果确定磷肥施用量;实施秸秆全量还田或者增施钾肥,种植绿肥和采取酸化改良措施,全面提升水稻田...